25402431204531 has 16 divisors (see below), whose sum is σ = 37843472937600. Its totient is φ = 16840345450824.

The previous prime is 25402431204497. The next prime is 25402431204533. The reversal of 25402431204531 is 13540213420452.

It is a happy number.

25402431204531 is a `hidden beast` number, since 2 + 5 + 40 + 2 + 43 + 120 + 453 + 1 = 666.

It is not a de Polignac number, because 25402431204531 - 2⁹ = 25402431204019 is a prime.

It is a super-2 number, since 2×25402431204531² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25402431204533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2628014121 + ... + 2628023786.

It is an arithmetic number, because the mean of its divisors is an integer number (2365217058600).

Almost surely, 2^{25402431204531} is an apocalyptic number.

25402431204531 is a deficient number, since it is larger than the sum of its proper divisors (12441041733069).

25402431204531 is a wasteful number, since it uses less digits than its factorization.

25402431204531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5256038095 (or 5256038089 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 25402431204531 its reverse (13540213420452), we get a palindrome (38942644624983).

The spelling of 25402431204531 in words is "twenty-five trillion, four hundred two billion, four hundred thirty-one million, two hundred four thousand, five hundred thirty-one".