31257961542719 has 2 divisors, whose sum is σ = 31257961542720. Its totient is φ = 31257961542718.

The previous prime is 31257961542707. The next prime is 31257961542727. The reversal of 31257961542719 is 91724516975213.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31257961542719 is a prime.

It is a super-2 number, since 2×31257961542719² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31257969542719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15628980771359 + 15628980771360.

It is an arithmetic number, because the mean of its divisors is an integer number (15628980771360).

Almost surely, 2^{31257961542719} is an apocalyptic number.

31257961542719 is a deficient number, since it is larger than the sum of its proper divisors (1).

31257961542719 is an equidigital number, since it uses as much as digits as its factorization.

31257961542719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28576800, while the sum is 62.

The spelling of 31257961542719 in words is "thirty-one trillion, two hundred fifty-seven billion, nine hundred sixty-one million, five hundred forty-two thousand, seven hundred nineteen".