251231453123231 has 12 divisors (see below), whose sum is σ = 292249260307800. Its totient is φ = 215340930841680.

The previous prime is 251231453123219. The next prime is 251231453123347. The reversal of 251231453123231 is 132321354132152.

251231453123231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-251231453123231 is a prime.

It is a super-2 number, since 2×251231453123231² (a number of 30 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 (251231453123531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33959345 + ... + 40690293.

It is an arithmetic number, because the mean of its divisors is an integer number (24354105025650).

Almost surely, 2^{251231453123231} is an apocalyptic number.

251231453123231 is a deficient number, since it is larger than the sum of its proper divisors (41017807184569).

251231453123231 is an equidigital number, since it uses as much as digits as its factorization.

251231453123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7492694 (or 7492687 counting only the distinct ones).

The product of its digits is 129600, while the sum is 38.

The spelling of 251231453123231 in words is "two hundred fifty-one trillion, two hundred thirty-one billion, four hundred fifty-three million, one hundred twenty-three thousand, two hundred thirty-one".