156207131 has 2 divisors, whose sum is σ = 156207132. Its totient is φ = 156207130.

The previous prime is 156207097. The next prime is 156207133. The reversal of 156207131 is 131702651.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156207131 is a prime.

It is a super-2 number, since 2×156207131² = 48801335550502322, which contains 22 as substring.

Together with 156207133, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 156207131.

It is not a weakly prime, because it can be changed into another prime (156207133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78103565 + 78103566.

It is an arithmetic number, because the mean of its divisors is an integer number (78103566).

Almost surely, 2^156207131 is an apocalyptic number.

156207131 is a deficient number, since it is larger than the sum of its proper divisors (1).

156207131 is an equidigital number, since it uses as much as digits as its factorization.

156207131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 156207131 is about 12498.2851223678. The cubic root of 156207131 is about 538.5594101567.

Adding to 156207131 its reverse (131702651), we get a palindrome (287909782).

The spelling of 156207131 in words is "one hundred fifty-six million, two hundred seven thousand, one hundred thirty-one".