231960431 has 2 divisors, whose sum is σ = 231960432. Its totient is φ = 231960430.

The previous prime is 231960413. The next prime is 231960457. The reversal of 231960431 is 134069132.

Together with previous prime (231960413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231960431 - 2⁶ = 231960367 is a prime.

It is a super-2 number, since 2×231960431² = 107611283099411522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 231960394 and 231960403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231960401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115980215 + 115980216.

It is an arithmetic number, because the mean of its divisors is an integer number (115980216).

Almost surely, 2^231960431 is an apocalyptic number.

231960431 is a deficient number, since it is larger than the sum of its proper divisors (1).

231960431 is an equidigital number, since it uses as much as digits as its factorization.

231960431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 231960431 is about 15230.2472402781. The cubic root of 231960431 is about 614.4284296726.

The spelling of 231960431 in words is "two hundred thirty-one million, nine hundred sixty thousand, four hundred thirty-one".