231531420120 has 256 divisors, whose sum is σ = 932602567680. Its totient is φ = 44409600000.

The previous prime is 231531420119. The next prime is 231531420137. The reversal of 231531420120 is 21024135132.

231531420120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 843631 + ... + 1083870.

It is an arithmetic number, because the mean of its divisors is an integer number (3642978780).

Almost surely, 2^231531420120 is an apocalyptic number.

231531420120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231531420120 is an abundant number, since it is smaller than the sum of its proper divisors (701071147560).

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

231531420120 is a wasteful number, since it uses less digits than its factorization.

231531420120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927546 (or 1927542 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 231531420120 its reverse (21024135132), we get a palindrome (252555555252).

The spelling of 231531420120 in words is "two hundred thirty-one billion, five hundred thirty-one million, four hundred twenty thousand, one hundred twenty".