231565262431 has 4 divisors (see below), whose sum is σ = 232061119992. Its totient is φ = 231069404872.

The previous prime is 231565262407. The next prime is 231565262473. The reversal of 231565262431 is 134262565132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231565262431 - 2²⁷ = 231431044703 is a prime.

It is a super-2 number, since 2×231565262431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231565262491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247928080 + ... + 247929013.

It is an arithmetic number, because the mean of its divisors is an integer number (58015279998).

Almost surely, 2^231565262431 is an apocalyptic number.

231565262431 is a deficient number, since it is larger than the sum of its proper divisors (495857561).

231565262431 is an equidigital number, since it uses as much as digits as its factorization.

231565262431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495857560.

The product of its digits is 259200, while the sum is 40.

The spelling of 231565262431 in words is "two hundred thirty-one billion, five hundred sixty-five million, two hundred sixty-two thousand, four hundred thirty-one".