25563992 has 32 divisors (see below), whose sum is σ = 49971600. Its totient is φ = 12249600.

The previous prime is 25563991. The next prime is 25563997. The reversal of 25563992 is 29936552.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25563991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18692 + ... + 20012.

Almost surely, 2^25563992 is an apocalyptic number.

It is an amenable number.

25563992 is a deficient number, since it is larger than the sum of its proper divisors (24407608).

25563992 is a wasteful number, since it uses less digits than its factorization.

25563992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427 (or 1423 counting only the distinct ones).

The product of its digits is 145800, while the sum is 41.

The square root of 25563992 is about 5056.0846511901. The cubic root of 25563992 is about 294.5842731719.

The spelling of 25563992 in words is "twenty-five million, five hundred sixty-three thousand, nine hundred ninety-two".