231531532310525 has 12 divisors (see below), whose sum is σ = 287099312084064. Its totient is φ = 185225089062000.

The previous prime is 231531532310503. The next prime is 231531532310539. The reversal of 231531532310525 is 525013235135132.

It is a de Polignac number, because none of the positive numbers 2^k-231531532310525 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44008070 + ... + 48987480.

It is an arithmetic number, because the mean of its divisors is an integer number (23924942673672).

Almost surely, 2^{231531532310525} is an apocalyptic number.

231531532310525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231531532310525 is a deficient number, since it is larger than the sum of its proper divisors (55567779773539).

231531532310525 is a wasteful number, since it uses less digits than its factorization.

231531532310525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6839332 (or 6839327 counting only the distinct ones).

The product of its (nonzero) digits is 405000, while the sum is 41.

Adding to 231531532310525 its reverse (525013235135132), we get a palindrome (756544767445657).

The spelling of 231531532310525 in words is "two hundred thirty-one trillion, five hundred thirty-one billion, five hundred thirty-two million, three hundred ten thousand, five hundred twenty-five".