131568631 has 16 divisors (see below), whose sum is σ = 138475008. Its totient is φ = 124883200.

The previous prime is 131568601. The next prime is 131568641. The reversal of 131568631 is 136865131.

It is a cyclic number.

It is not a de Polignac number, because 131568631 - 2⁵ = 131568599 is a prime.

It is a super-2 number, since 2×131568631² = 34620609326428322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131568601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 414885 + ... + 415201.

It is an arithmetic number, because the mean of its divisors is an integer number (8654688).

Almost surely, 2^131568631 is an apocalyptic number.

131568631 is a deficient number, since it is larger than the sum of its proper divisors (6906377).

131568631 is a wasteful number, since it uses less digits than its factorization.

131568631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602.

The product of its digits is 12960, while the sum is 34.

The square root of 131568631 is about 11470.3370046394. The cubic root of 131568631 is about 508.6090910038.

The spelling of 131568631 in words is "one hundred thirty-one million, five hundred sixty-eight thousand, six hundred thirty-one".