25431215428 has 12 divisors (see below), whose sum is σ = 45940260352. Its totient is φ = 12305426760.

The previous prime is 25431215423. The next prime is 25431215429. The reversal of 25431215428 is 82451213452.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (25431215423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102545100 + ... + 102545347.

Almost surely, 2^25431215428 is an apocalyptic number.

It is an amenable number.

25431215428 is a deficient number, since it is larger than the sum of its proper divisors (20509044924).

25431215428 is a wasteful number, since it uses less digits than its factorization.

25431215428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205090482 (or 205090480 counting only the distinct ones).

The product of its digits is 76800, while the sum is 37.

The spelling of 25431215428 in words is "twenty-five billion, four hundred thirty-one million, two hundred fifteen thousand, four hundred twenty-eight".