25431401425 has 6 divisors (see below), whose sum is σ = 31534937798. Its totient is φ = 20345121120.

The previous prime is 25431401393. The next prime is 25431401453. The reversal of 25431401425 is 52410413452.

It can be written as a sum of positive squares in 3 ways, for example, as 2634129 + 25428767296 = 1623^2 + 159464^2 .

It is not a de Polignac number, because 25431401425 - 2⁵ = 25431401393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 508628004 + ... + 508628053.

Almost surely, 2^25431401425 is an apocalyptic number.

25431401425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25431401425 is a deficient number, since it is larger than the sum of its proper divisors (6103536373).

25431401425 is a wasteful number, since it uses less digits than its factorization.

25431401425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017256067 (or 1017256062 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 25431401425 its reverse (52410413452), we get a palindrome (77841814877).

The spelling of 25431401425 in words is "twenty-five billion, four hundred thirty-one million, four hundred one thousand, four hundred twenty-five".