56571020 has 24 divisors (see below), whose sum is σ = 129599568. Its totient is φ = 20571200.

The previous prime is 56571013. The next prime is 56571041. The reversal of 56571020 is 2017565.

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, 128351 + ... + 128790.

It is an arithmetic number, because the mean of its divisors is an integer number (5399982).

Almost surely, 2^56571020 is an apocalyptic number.

It is an amenable number.

56571020 is an abundant number, since it is smaller than the sum of its proper divisors (73028548).

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

56571020 is a wasteful number, since it uses less digits than its factorization.

56571020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257161 (or 257159 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 56571020 is about 7521.3708856830. The cubic root of 56571020 is about 383.8822248043.

Adding to 56571020 its reverse (2017565), we get a palindrome (58588585).

The spelling of 56571020 in words is "fifty-six million, five hundred seventy-one thousand, twenty".