56216540 has 12 divisors (see below), whose sum is σ = 118054776. Its totient is φ = 22486608.

The previous prime is 56216539. The next prime is 56216549. The reversal of 56216540 is 4561265.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56216549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1405394 + ... + 1405433.

It is an arithmetic number, because the mean of its divisors is an integer number (9837898).

Almost surely, 2^56216540 is an apocalyptic number.

It is an amenable number.

56216540 is an abundant number, since it is smaller than the sum of its proper divisors (61838236).

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

56216540 is a wasteful number, since it uses less digits than its factorization.

56216540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810836 (or 2810834 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 56216540 is about 7497.7690015097. The cubic root of 56216540 is about 383.0787286431.

The spelling of 56216540 in words is "fifty-six million, two hundred sixteen thousand, five hundred forty".