31519431107 has 2 divisors, whose sum is σ = 31519431108. Its totient is φ = 31519431106.

The previous prime is 31519431103. The next prime is 31519431149. The reversal of 31519431107 is 70113491513.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31519431107 - 2² = 31519431103 is a prime.

It is not a weakly prime, because it can be changed into another prime (31519431103) 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, 15759715553 + 15759715554.

It is an arithmetic number, because the mean of its divisors is an integer number (15759715554).

Almost surely, 2^31519431107 is an apocalyptic number.

31519431107 is a deficient number, since it is larger than the sum of its proper divisors (1).

31519431107 is an equidigital number, since it uses as much as digits as its factorization.

31519431107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 35.

The spelling of 31519431107 in words is "thirty-one billion, five hundred nineteen million, four hundred thirty-one thousand, one hundred seven".