231513454220512 has 24 divisors (see below), whose sum is σ = 471509082412200. Its totient is φ = 111765115830144.

The previous prime is 231513454220459. The next prime is 231513454220513. The reversal of 231513454220512 is 215022454315132.

It is a super-2 number, since 2×231513454220512² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231513454220513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124737851562 + ... + 124737853417.

It is an arithmetic number, because the mean of its divisors is an integer number (19646211767175).

Almost surely, 2^{231513454220512} is an apocalyptic number.

It is an amenable number.

231513454220512 is an abundant number, since it is smaller than the sum of its proper divisors (239995628191688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231513454220512 is a wasteful number, since it uses less digits than its factorization.

231513454220512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249475705018 (or 249475705010 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 231513454220512 in words is "two hundred thirty-one trillion, five hundred thirteen billion, four hundred fifty-four million, two hundred twenty thousand, five hundred twelve".