202

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Number

$202$ (two hundred and two) is:

$2 \times 101$

The $2$nd positive integer after $200$ that cannot be made into a prime number by changing just $1$ digit

The $9$th Smith number after $4$, $22$, $27$, $58$, $85$, $94$, $121$, $166$:

$2 + 0 + 2 = 2 + 1 + 0 + 1 = 4$

The $10$th palindromic integer after $0$, $1$, $2$, $3$, $11$, $22$, $101$, $111$, $121$ whose square is also palindromic integer

$202^2 = 40 \, 804$

The smallest positive integer which can be expressed as the sum of $2$ distinct lucky numbers in $13$ different ways

The $18$th noncototient after $10$, $26$, $34$, $50$, $52$, $58$, $86$, $100$, $116$, $122$, $130$, $134$, $146$, $154$, $170$, $172$, $186$:

$\nexists m \in \Z_{>0}: m - \map \phi m = 202$

where $\map \phi m$ denotes the Euler $\phi$ function

The $29$th nontotient:

$\nexists m \in \Z_{>0}: \map \phi m = 202$

where $\map \phi m$ denotes the Euler $\phi$ function

Also see

• Previous  ... Next: Square of Small-Digit Palindromic Number is Palindromic
• Previous  ... Next: Smallest Sum of 2 Lucky Numbers in n Ways
• Previous  ... Next: Smith Number
• Previous  ... Next: Noncototient
• Previous  ... Next: Nontotient
• Previous  ... Next: Numbers that cannot be made Prime by changing 1 Digit