231840634240 has 32 divisors (see below), whose sum is σ = 554244017760. Its totient is φ = 92736253440.

The previous prime is 231840634213. The next prime is 231840634243. The reversal of 231840634240 is 42436048132.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 231840634240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231840634243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181124856 + ... + 181126135.

It is an arithmetic number, because the mean of its divisors is an integer number (17320125555).

Almost surely, 2^231840634240 is an apocalyptic number.

231840634240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231840634240 is an abundant number, since it is smaller than the sum of its proper divisors (322403383520).

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

231840634240 is an equidigital number, since it uses as much as digits as its factorization.

231840634240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362251010 (or 362250998 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 37.

The spelling of 231840634240 in words is "two hundred thirty-one billion, eight hundred forty million, six hundred thirty-four thousand, two hundred forty".