56211990 has 32 divisors (see below), whose sum is σ = 139262976. Its totient is φ = 14506080.

The previous prime is 56211989. The next prime is 56211997. The reversal of 56211990 is 9911265.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56211997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29292 + ... + 31151.

It is an arithmetic number, because the mean of its divisors is an integer number (4351968).

Almost surely, 2^56211990 is an apocalyptic number.

56211990 is an abundant number, since it is smaller than the sum of its proper divisors (83050986).

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

56211990 is a wasteful number, since it uses less digits than its factorization.

56211990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60484.

The product of its (nonzero) digits is 4860, while the sum is 33.

The square root of 56211990 is about 7497.4655717782. The cubic root of 56211990 is about 383.0683932789.

The spelling of 56211990 in words is "fifty-six million, two hundred eleven thousand, nine hundred ninety".