231545520540131 has 32 divisors (see below), whose sum is σ = 271488413218176. Its totient is φ = 193333639680000.

The previous prime is 231545520540097. The next prime is 231545520540133. The reversal of 231545520540131 is 131045025545132.

It is a cyclic number.

It is not a de Polignac number, because 231545520540131 - 2²⁶ = 231545453431267 is a prime.

It is a super-2 number, since 2×231545520540131² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (231545520540133) 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, 1113990191 + ... + 1114198023.

It is an arithmetic number, because the mean of its divisors is an integer number (8484012913068).

Almost surely, 2^{231545520540131} is an apocalyptic number.

231545520540131 is a deficient number, since it is larger than the sum of its proper divisors (39942892678045).

231545520540131 is a wasteful number, since it uses less digits than its factorization.

231545520540131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213743.

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 231545520540131 in words is "two hundred thirty-one trillion, five hundred forty-five billion, five hundred twenty million, five hundred forty thousand, one hundred thirty-one".