25415512531 has 2 divisors, whose sum is σ = 25415512532. Its totient is φ = 25415512530.

The previous prime is 25415512519. The next prime is 25415512579. The reversal of 25415512531 is 13521551452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25415512531 - 2⁷ = 25415512403 is a prime.

It is a super-2 number, since 2×25415512531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25415512501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12707756265 + 12707756266.

It is an arithmetic number, because the mean of its divisors is an integer number (12707756266).

Almost surely, 2^25415512531 is an apocalyptic number.

25415512531 is a deficient number, since it is larger than the sum of its proper divisors (1).

25415512531 is an equidigital number, since it uses as much as digits as its factorization.

25415512531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30000, while the sum is 34.

The spelling of 25415512531 in words is "twenty-five billion, four hundred fifteen million, five hundred twelve thousand, five hundred thirty-one".