231532555040 has 24 divisors (see below), whose sum is σ = 546995661660. Its totient is φ = 92613021952.

The previous prime is 231532555027. The next prime is 231532555073. The reversal of 231532555040 is 40555235132.

It can be written as a sum of positive squares in 2 ways, for example, as 197409598864 + 34122956176 = 444308^2 + 184724^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723539075 + ... + 723539394.

Almost surely, 2^231532555040 is an apocalyptic number.

231532555040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231532555040 is an abundant number, since it is smaller than the sum of its proper divisors (315463106620).

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

231532555040 is a wasteful number, since it uses less digits than its factorization.

231532555040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447078484 (or 1447078476 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 231532555040 in words is "two hundred thirty-one billion, five hundred thirty-two million, five hundred fifty-five thousand, forty".