31012525129 has 2 divisors, whose sum is σ = 31012525130. Its totient is φ = 31012525128.

The previous prime is 31012525069. The next prime is 31012525139. The reversal of 31012525129 is 92152521013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30556788025 + 455737104 = 174805^2 + 21348^2 .

It is a cyclic number.

It is not a de Polignac number, because 31012525129 - 2⁷ = 31012525001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31012525129.

It is not a weakly prime, because it can be changed into another prime (31012525139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506262564 + 15506262565.

It is an arithmetic number, because the mean of its divisors is an integer number (15506262565).

Almost surely, 2^31012525129 is an apocalyptic number.

It is an amenable number.

31012525129 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012525129 is an equidigital number, since it uses as much as digits as its factorization.

31012525129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 31012525129 in words is "thirty-one billion, twelve million, five hundred twenty-five thousand, one hundred twenty-nine".