431561136 has 40 divisors (see below), whose sum is σ = 1173545920. Its totient is φ = 136282176.

The previous prime is 431561131. The next prime is 431561147. The reversal of 431561136 is 631165134.

It is a super-2 number, since 2×431561136² = 372490028211220992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (431561131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235690 + ... + 237513.

It is an arithmetic number, because the mean of its divisors is an integer number (29338648).

Almost surely, 2^431561136 is an apocalyptic number.

It is an amenable number.

431561136 is an abundant number, since it is smaller than the sum of its proper divisors (741984784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

431561136 is a wasteful number, since it uses less digits than its factorization.

431561136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473233 (or 473227 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 431561136 is about 20774.0495811481. The cubic root of 431561136 is about 755.6965552438.

The spelling of 431561136 in words is "four hundred thirty-one million, five hundred sixty-one thousand, one hundred thirty-six".