56016621 has 24 divisors (see below), whose sum is σ = 83276544. Its totient is φ = 36266400.

The previous prime is 56016607. The next prime is 56016641. The reversal of 56016621 is 12661065.

It is a happy number.

It is not a de Polignac number, because 56016621 - 2⁵ = 56016589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56016641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63435 + ... + 64311.

It is an arithmetic number, because the mean of its divisors is an integer number (3469856).

Almost surely, 2^56016621 is an apocalyptic number.

It is an amenable number.

56016621 is a deficient number, since it is larger than the sum of its proper divisors (27259923).

56016621 is a wasteful number, since it uses less digits than its factorization.

56016621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081 (or 1078 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 56016621 is about 7484.4252284327. The cubic root of 56016621 is about 382.6240837975.

Adding to 56016621 its reverse (12661065), we get a palindrome (68677686).

The spelling of 56016621 in words is "fifty-six million, sixteen thousand, six hundred twenty-one".