56683521 has 12 divisors (see below), whose sum is σ = 82302948. Its totient is φ = 37592064.

The previous prime is 56683513. The next prime is 56683567. The reversal of 56683521 is 12538665.

56683521 is a `hidden beast` number, since 56 + 6 + 83 + 521 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 26378496 + 30305025 = 5136^2 + 5505^2 .

It is not a de Polignac number, because 56683521 - 2³ = 56683513 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56683511) 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, 14580 + ... + 18053.

It is an arithmetic number, because the mean of its divisors is an integer number (6858579).

Almost surely, 2^56683521 is an apocalyptic number.

It is an amenable number.

56683521 is a deficient number, since it is larger than the sum of its proper divisors (25619427).

56683521 is a wasteful number, since it uses less digits than its factorization.

56683521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32832 (or 32829 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 56683521 is about 7528.8459274978. The cubic root of 56683521 is about 384.1365277876.

The spelling of 56683521 in words is "fifty-six million, six hundred eighty-three thousand, five hundred twenty-one".