202145131 has 2 divisors, whose sum is σ = 202145132. Its totient is φ = 202145130.

The previous prime is 202145101. The next prime is 202145173. The reversal of 202145131 is 131541202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 202145131 - 2¹¹ = 202143083 is a prime.

It is a super-2 number, since 2×202145131² = 81725307974014322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 202145099 and 202145108.

It is not a weakly prime, because it can be changed into another prime (202145101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101072565 + 101072566.

It is an arithmetic number, because the mean of its divisors is an integer number (101072566).

Almost surely, 2^202145131 is an apocalyptic number.

202145131 is a deficient number, since it is larger than the sum of its proper divisors (1).

202145131 is an equidigital number, since it uses as much as digits as its factorization.

202145131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 202145131 is about 14217.7751775726. The cubic root of 202145131 is about 586.8869171654.

Adding to 202145131 its reverse (131541202), we get a palindrome (333686333).

The spelling of 202145131 in words is "two hundred two million, one hundred forty-five thousand, one hundred thirty-one".