56521838 has 16 divisors (see below), whose sum is σ = 90856080. Its totient is φ = 26276736.

The previous prime is 56521837. The next prime is 56521847. The reversal of 56521838 is 83812565.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56521831) 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, 7193 + ... + 12836.

It is an arithmetic number, because the mean of its divisors is an integer number (5678505).

Almost surely, 2^56521838 is an apocalyptic number.

56521838 is a deficient number, since it is larger than the sum of its proper divisors (34334242).

56521838 is a wasteful number, since it uses less digits than its factorization.

56521838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20131.

The product of its digits is 57600, while the sum is 38.

The square root of 56521838 is about 7518.1006909990. The cubic root of 56521838 is about 383.7709453920.

The spelling of 56521838 in words is "fifty-six million, five hundred twenty-one thousand, eight hundred thirty-eight".