216459656 has 24 divisors (see below), whose sum is σ = 472125870. Its totient is φ = 92768256.

The previous prime is 216459631. The next prime is 216459679. The reversal of 216459656 is 656954612.

216459656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 111724900 + 104734756 = 10570^2 + 10234^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 275705 + ... + 276488.

Almost surely, 2^216459656 is an apocalyptic number.

It is an amenable number.

216459656 is an abundant number, since it is smaller than the sum of its proper divisors (255666214).

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

216459656 is a wasteful number, since it uses less digits than its factorization.

216459656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552213 (or 552202 counting only the distinct ones).

The product of its digits is 388800, while the sum is 44.

The square root of 216459656 is about 14712.5679607606. The cubic root of 216459656 is about 600.4253058610.

The spelling of 216459656 in words is "two hundred sixteen million, four hundred fifty-nine thousand, six hundred fifty-six".