56216505 has 32 divisors (see below), whose sum is σ = 93024000. Its totient is φ = 28968192.

The previous prime is 56216491. The next prime is 56216507. The reversal of 56216505 is 50561265.

It is not a de Polignac number, because 56216505 - 2⁸ = 56216249 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56216507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110191 + ... + 110699.

It is an arithmetic number, because the mean of its divisors is an integer number (2907000).

Almost surely, 2^56216505 is an apocalyptic number.

It is an amenable number.

56216505 is a deficient number, since it is larger than the sum of its proper divisors (36807495).

56216505 is a wasteful number, since it uses less digits than its factorization.

56216505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 56216505 is about 7497.7666674817. The cubic root of 56216505 is about 383.0786491424.

The spelling of 56216505 in words is "fifty-six million, two hundred sixteen thousand, five hundred five".