31012525069 has 2 divisors, whose sum is σ = 31012525070. Its totient is φ = 31012525068.

The previous prime is 31012525057. The next prime is 31012525129. The reversal of 31012525069 is 96052521013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28819476169 + 2193048900 = 169763^2 + 46830^2 .

It is a cyclic number.

It is not a de Polignac number, because 31012525069 - 2²⁵ = 30978970637 is a prime.

It is a super-2 number, since 2×31012525069² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31012525669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506262534 + 15506262535.

It is an arithmetic number, because the mean of its divisors is an integer number (15506262535).

Almost surely, 2^31012525069 is an apocalyptic number.

It is an amenable number.

31012525069 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012525069 is an equidigital number, since it uses as much as digits as its factorization.

31012525069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 34.

The spelling of 31012525069 in words is "thirty-one billion, twelve million, five hundred twenty-five thousand, sixty-nine".