231531454523031 has 32 divisors (see below), whose sum is σ = 334662910095360. Its totient is φ = 141534861408000.

The previous prime is 231531454523021. The next prime is 231531454523081. The reversal of 231531454523031 is 130325454135132.

It is not a de Polignac number, because 231531454523031 - 2³¹ = 231529307039383 is a prime.

It is a super-2 number, since 2×231531454523031² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231531454523021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 374755866 + ... + 375373176.

It is an arithmetic number, because the mean of its divisors is an integer number (10458215940480).

Almost surely, 2^{231531454523031} is an apocalyptic number.

231531454523031 is a deficient number, since it is larger than the sum of its proper divisors (103131455572329).

231531454523031 is a wasteful number, since it uses less digits than its factorization.

231531454523031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681167.

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 231531454523031 in words is "two hundred thirty-one trillion, five hundred thirty-one billion, four hundred fifty-four million, five hundred twenty-three thousand, thirty-one".