231912152128 has 28 divisors (see below), whose sum is σ = 460310290960. Its totient is φ = 115928456832.

The previous prime is 231912152089. The next prime is 231912152141. The reversal of 231912152128 is 821251219132.

231912152128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231912152128² (a number of 24 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 159426 + ... + 699457.

Almost surely, 2^231912152128 is an apocalyptic number.

It is an amenable number.

231912152128 is a deficient number, since it is larger than the sum of its proper divisors (228398138832).

231912152128 is an equidigital number, since it uses as much as digits as its factorization.

231912152128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863114 (or 863104 counting only the distinct ones).

The product of its digits is 17280, while the sum is 37.

The spelling of 231912152128 in words is "two hundred thirty-one billion, nine hundred twelve million, one hundred fifty-two thousand, one hundred twenty-eight".