56639825 has 12 divisors (see below), whose sum is σ = 76618608. Its totient is φ = 41192400.

The previous prime is 56639809. The next prime is 56639827. The reversal of 56639825 is 52893665.

It is a happy number.

It is not a de Polignac number, because 56639825 - 2⁴ = 56639809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56639827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102707 + ... + 103256.

It is an arithmetic number, because the mean of its divisors is an integer number (6384884).

Almost surely, 2^56639825 is an apocalyptic number.

56639825 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56639825 is a deficient number, since it is larger than the sum of its proper divisors (19978783).

56639825 is a wasteful number, since it uses less digits than its factorization.

56639825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205984 (or 205979 counting only the distinct ones).

The product of its digits is 388800, while the sum is 44.

The square root of 56639825 is about 7525.9434624504. The cubic root of 56639825 is about 384.0377951261.

The spelling of 56639825 in words is "fifty-six million, six hundred thirty-nine thousand, eight hundred twenty-five".