231587125225 has 27 divisors (see below), whose sum is σ = 290155376133. Its totient is φ = 183362084640.

The previous prime is 231587125213. The next prime is 231587125243. The reversal of 231587125225 is 522521785132.

The square root of 231587125225 is 481235.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 849081321 + 230738043904 = 29139^2 + 480352^2 .

It is a de Polignac number, because none of the positive numbers 2^k-231587125225 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 262272634 + ... + 262273516.

Almost surely, 2^231587125225 is an apocalyptic number.

231587125225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

231587125225 is the 481235-th square number.

231587125225 is the 240618-th centered octagonal number.

It is an amenable number.

231587125225 is a deficient number, since it is larger than the sum of its proper divisors (58568250908).

231587125225 is an frugal number, since it uses more digits than its factorization.

231587125225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994 (or 997 counting only the distinct ones).

The product of its digits is 336000, while the sum is 43.

The spelling of 231587125225 in words is "two hundred thirty-one billion, five hundred eighty-seven million, one hundred twenty-five thousand, two hundred twenty-five".