25395915431 has 2 divisors, whose sum is σ = 25395915432. Its totient is φ = 25395915430.

The previous prime is 25395915421. The next prime is 25395915437. The reversal of 25395915431 is 13451959352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25395915431 - 2¹⁸ = 25395653287 is a prime.

It is a super-2 number, since 2×25395915431² (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 (25395915437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12697957715 + 12697957716.

It is an arithmetic number, because the mean of its divisors is an integer number (12697957716).

Almost surely, 2^25395915431 is an apocalyptic number.

25395915431 is a deficient number, since it is larger than the sum of its proper divisors (1).

25395915431 is an equidigital number, since it uses as much as digits as its factorization.

25395915431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 729000, while the sum is 47.

The spelling of 25395915431 in words is "twenty-five billion, three hundred ninety-five million, nine hundred fifteen thousand, four hundred thirty-one".