31252257474731 has 2 divisors, whose sum is σ = 31252257474732. Its totient is φ = 31252257474730.

The previous prime is 31252257474677. The next prime is 31252257474761. The reversal of 31252257474731 is 13747475225213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31252257474731 - 2⁶ = 31252257474667 is a prime.

It is a super-2 number, since 2×31252257474731² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31252257474761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15626128737365 + 15626128737366.

It is an arithmetic number, because the mean of its divisors is an integer number (15626128737366).

Almost surely, 2^{31252257474731} is an apocalyptic number.

31252257474731 is a deficient number, since it is larger than the sum of its proper divisors (1).

31252257474731 is an equidigital number, since it uses as much as digits as its factorization.

31252257474731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9878400, while the sum is 53.

The spelling of 31252257474731 in words is "thirty-one trillion, two hundred fifty-two billion, two hundred fifty-seven million, four hundred seventy-four thousand, seven hundred thirty-one".