231560431 has 2 divisors, whose sum is σ = 231560432. Its totient is φ = 231560430.

The previous prime is 231560423. The next prime is 231560479. The reversal of 231560431 is 134065132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231560431 - 2³ = 231560423 is a prime.

It is a super-2 number, since 2×231560431² = 107240466409811522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231560396 and 231560405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231560491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115780215 + 115780216.

It is an arithmetic number, because the mean of its divisors is an integer number (115780216).

Almost surely, 2^231560431 is an apocalyptic number.

231560431 is a deficient number, since it is larger than the sum of its proper divisors (1).

231560431 is an equidigital number, since it uses as much as digits as its factorization.

231560431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 231560431 is about 15217.1098109989. The cubic root of 231560431 is about 614.0750464421.

The spelling of 231560431 in words is "two hundred thirty-one million, five hundred sixty thousand, four hundred thirty-one".