231304120390 has 16 divisors (see below), whose sum is σ = 475825619232. Its totient is φ = 79304269824.

The previous prime is 231304120339. The next prime is 231304120391. The reversal of 231304120390 is 93021403132.

231304120390 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231304120390² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231304120391) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1652172219 + ... + 1652172358.

It is an arithmetic number, because the mean of its divisors is an integer number (29739101202).

Almost surely, 2^231304120390 is an apocalyptic number.

231304120390 is an abundant number, since it is smaller than the sum of its proper divisors (244521498842).

231304120390 is a wasteful number, since it uses less digits than its factorization.

231304120390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3304344591.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 231304120390 in words is "two hundred thirty-one billion, three hundred four million, one hundred twenty thousand, three hundred ninety".