216562456 has 96 divisors (see below), whose sum is σ = 496244880. Its totient is φ = 87552000.

The previous prime is 216562447. The next prime is 216562469. The reversal of 216562456 is 654265612.

216562456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (86400) is a multiple of the sum of its prime divisors (450).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 539856 + ... + 540256.

Almost surely, 2^216562456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216562456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248122440).

216562456 is an abundant number, since it is smaller than the sum of its proper divisors (279682424).

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

216562456 is a wasteful number, since it uses less digits than its factorization.

216562456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 450 counting only the distinct ones).

The product of its digits is 86400, while the sum is 37.

The square root of 216562456 is about 14716.0611577963. The cubic root of 216562456 is about 600.5203412039.

The spelling of 216562456 in words is "two hundred sixteen million, five hundred sixty-two thousand, four hundred fifty-six".