231505552125 has 48 divisors (see below), whose sum is σ = 417705902640. Its totient is φ = 123357628800.

The previous prime is 231505552111. The next prime is 231505552129. The reversal of 231505552125 is 521255505132.

231505552125 is a `hidden beast` number, since 2 + 31 + 50 + 5 + 552 + 1 + 25 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 124148408409 + 107357143716 = 352347^2 + 327654^2 .

It is not a de Polignac number, because 231505552125 - 2¹⁷ = 231505421053 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 231505552125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231505552129) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1154847 + ... + 1340403.

It is an arithmetic number, because the mean of its divisors is an integer number (8702206305).

Almost surely, 2^231505552125 is an apocalyptic number.

231505552125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231505552125 is a deficient number, since it is larger than the sum of its proper divisors (186200350515).

231505552125 is a wasteful number, since it uses less digits than its factorization.

231505552125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186687 (or 186674 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 231505552125 in words is "two hundred thirty-one billion, five hundred five million, five hundred fifty-two thousand, one hundred twenty-five".