231550510150020 has 96 divisors (see below), whose sum is σ = 655496249990400. Its totient is φ = 61066966671360.

The previous prime is 231550510149983. The next prime is 231550510150033. The reversal of 231550510150020 is 20051015055132.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 231550510150020.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19914445 + ... + 29320404.

It is an arithmetic number, because the mean of its divisors is an integer number (6828085937400).

Almost surely, 2^{231550510150020} is an apocalyptic number.

231550510150020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231550510150020 is an abundant number, since it is smaller than the sum of its proper divisors (423945739840380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231550510150020 is a wasteful number, since it uses less digits than its factorization.

231550510150020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49235725 (or 49235723 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 30.

The spelling of 231550510150020 in words is "two hundred thirty-one trillion, five hundred fifty billion, five hundred ten million, one hundred fifty thousand, twenty".