231240112440 has 64 divisors (see below), whose sum is σ = 694547481600. Its totient is φ = 61590506112.

The previous prime is 231240112421. The next prime is 231240112451. The reversal of 231240112440 is 44211042132.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 231240112440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1047712 + ... + 1249071.

It is an arithmetic number, because the mean of its divisors is an integer number (10852304400).

Almost surely, 2^231240112440 is an apocalyptic number.

231240112440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231240112440 is an abundant number, since it is smaller than the sum of its proper divisors (463307369160).

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

231240112440 is a wasteful number, since it uses less digits than its factorization.

231240112440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2297636 (or 2297632 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 231240112440 its reverse (44211042132), we get a palindrome (275451154572).

The spelling of 231240112440 in words is "two hundred thirty-one billion, two hundred forty million, one hundred twelve thousand, four hundred forty".