56553980 has 24 divisors (see below), whose sum is σ = 135729888. Its totient is φ = 19389888.

The previous prime is 56553979. The next prime is 56553997. The reversal of 56553980 is 8935565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201839 + ... + 202118.

It is an arithmetic number, because the mean of its divisors is an integer number (5655412).

Almost surely, 2^56553980 is an apocalyptic number.

It is an amenable number.

56553980 is an abundant number, since it is smaller than the sum of its proper divisors (79175908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56553980 is a wasteful number, since it uses less digits than its factorization.

56553980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403973 (or 403971 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 56553980 is about 7520.2380281478. The cubic root of 56553980 is about 383.8436773289.

It can be divided in two parts, 565 and 53980, that added together give a palindrome (54545).

The spelling of 56553980 in words is "fifty-six million, five hundred fifty-three thousand, nine hundred eighty".