2218057656 has 16 divisors (see below), whose sum is σ = 5545144200. Its totient is φ = 739352544.

The previous prime is 2218057651. The next prime is 2218057687. The reversal of 2218057656 is 6567508122.

2218057656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218057651) 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, 46209511 + ... + 46209558.

Almost surely, 2^2218057656 is an apocalyptic number.

It is an amenable number.

2218057656 is an abundant number, since it is smaller than the sum of its proper divisors (3327086544).

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

2218057656 is a wasteful number, since it uses less digits than its factorization.

2218057656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92419078 (or 92419074 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 2218057656 is about 47096.2594693039. The cubic root of 2218057656 is about 1304.1401843470.

The spelling of 2218057656 in words is "two billion, two hundred eighteen million, fifty-seven thousand, six hundred fifty-six".