231513523435225 has 6 divisors (see below), whose sum is σ = 287076769059710. Its totient is φ = 185210818748160.

The previous prime is 231513523435169. The next prime is 231513523435279. The reversal of 231513523435225 is 522534325315132.

It can be written as a sum of positive squares in 3 ways, for example, as 4336402254409 + 227177121180816 = 2082403^2 + 15072396^2 .

It is not a de Polignac number, because 231513523435225 - 2¹⁷ = 231513523304153 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4630270468680 + ... + 4630270468729.

Almost surely, 2^{231513523435225} is an apocalyptic number.

231513523435225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231513523435225 is a deficient number, since it is larger than the sum of its proper divisors (55563245624485).

231513523435225 is an equidigital number, since it uses as much as digits as its factorization.

231513523435225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9260540937419 (or 9260540937414 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 46.

The spelling of 231513523435225 in words is "two hundred thirty-one trillion, five hundred thirteen billion, five hundred twenty-three million, four hundred thirty-five thousand, two hundred twenty-five".