231521550152131 has 16 divisors (see below), whose sum is σ = 244229278775040. Its totient is φ = 218866155187680.

The previous prime is 231521550152083. The next prime is 231521550152159. The reversal of 231521550152131 is 131251055125132.

It is a cyclic number.

It is not a de Polignac number, because 231521550152131 - 2⁷ = 231521550152003 is a prime.

It is a super-2 number, since 2×231521550152131² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231521550150131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86495626 + ... + 89132128.

It is an arithmetic number, because the mean of its divisors is an integer number (15264329923440).

Almost surely, 2^{231521550152131} is an apocalyptic number.

231521550152131 is a deficient number, since it is larger than the sum of its proper divisors (12707728622909).

231521550152131 is a wasteful number, since it uses less digits than its factorization.

231521550152131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2646426.

The product of its (nonzero) digits is 45000, while the sum is 37.

The spelling of 231521550152131 in words is "two hundred thirty-one trillion, five hundred twenty-one billion, five hundred fifty million, one hundred fifty-two thousand, one hundred thirty-one".