231540455321525 has 144 divisors (see below), whose sum is σ = 348946083967680. Its totient is φ = 151808791680000.

The previous prime is 231540455321519. The next prime is 231540455321537. The reversal of 231540455321525 is 525123554045132.

It is not a de Polignac number, because 231540455321525 - 2¹⁴ = 231540455305141 is a prime.

It is a super-3 number, since 3×231540455321525³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 231540455321525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 8693729609 + ... + 8693756241.

It is an arithmetic number, because the mean of its divisors is an integer number (2423236694220).

Almost surely, 2^{231540455321525} is an apocalyptic number.

231540455321525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231540455321525 is a deficient number, since it is larger than the sum of its proper divisors (117405628646155).

231540455321525 is a wasteful number, since it uses less digits than its factorization.

231540455321525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30004 (or 29992 counting only the distinct ones).

The product of its (nonzero) digits is 3600000, while the sum is 47.

The spelling of 231540455321525 in words is "two hundred thirty-one trillion, five hundred forty billion, four hundred fifty-five million, three hundred twenty-one thousand, five hundred twenty-five".