231739802431 has 2 divisors, whose sum is σ = 231739802432. Its totient is φ = 231739802430.

The previous prime is 231739802381. The next prime is 231739802443. The reversal of 231739802431 is 134208937132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231739802431 - 2²¹ = 231737705279 is a prime.

It is a super-2 number, since 2×231739802431² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231739872431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115869901215 + 115869901216.

It is an arithmetic number, because the mean of its divisors is an integer number (115869901216).

Almost surely, 2^231739802431 is an apocalyptic number.

231739802431 is a deficient number, since it is larger than the sum of its proper divisors (1).

231739802431 is an equidigital number, since it uses as much as digits as its factorization.

231739802431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 231739802431 in words is "two hundred thirty-one billion, seven hundred thirty-nine million, eight hundred two thousand, four hundred thirty-one".