231110513987 has 2 divisors, whose sum is σ = 231110513988. Its totient is φ = 231110513986.

The previous prime is 231110513971. The next prime is 231110514017. The reversal of 231110513987 is 789315011132.

231110513987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231110513987 - 2⁴ = 231110513971 is a prime.

It is not a weakly prime, because it can be changed into another prime (231110513917) 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 as a sum of consecutive naturals, namely, 115555256993 + 115555256994.

It is an arithmetic number, because the mean of its divisors is an integer number (115555256994).

Almost surely, 2^231110513987 is an apocalyptic number.

231110513987 is a deficient number, since it is larger than the sum of its proper divisors (1).

231110513987 is an equidigital number, since it uses as much as digits as its factorization.

231110513987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 41.

The spelling of 231110513987 in words is "two hundred thirty-one billion, one hundred ten million, five hundred thirteen thousand, nine hundred eighty-seven".