216532456 has 16 divisors (see below), whose sum is σ = 463998240. Its totient is φ = 92799600.

The previous prime is 216532447. The next prime is 216532457. The reversal of 216532456 is 654235612.

It is not an unprimeable number, because it can be changed into a prime (216532457) 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, 1933270 + ... + 1933381.

It is an arithmetic number, because the mean of its divisors is an integer number (28999890).

Almost surely, 2^216532456 is an apocalyptic number.

It is an amenable number.

216532456 is an abundant number, since it is smaller than the sum of its proper divisors (247465784).

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

216532456 is a wasteful number, since it uses less digits than its factorization.

216532456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3866664 (or 3866660 counting only the distinct ones).

The product of its digits is 43200, while the sum is 34.

The square root of 216532456 is about 14715.0418280071. The cubic root of 216532456 is about 600.4926102627.

The spelling of 216532456 in words is "two hundred sixteen million, five hundred thirty-two thousand, four hundred fifty-six".