216782532 has 36 divisors (see below), whose sum is σ = 556966956. Its totient is φ = 71075520.

The previous prime is 216782507. The next prime is 216782549. The reversal of 216782532 is 235287612.

It can be written as a sum of positive squares in 2 ways, for example, as 120428676 + 96353856 = 10974^2 + 9816^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47163 + ... + 51554.

Almost surely, 2^216782532 is an apocalyptic number.

It is an amenable number.

216782532 is an abundant number, since it is smaller than the sum of its proper divisors (340184424).

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

216782532 is a wasteful number, since it uses less digits than its factorization.

216782532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98788 (or 98783 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 216782532 is about 14723.5366675266. The cubic root of 216782532 is about 600.7236934288.

The spelling of 216782532 in words is "two hundred sixteen million, seven hundred eighty-two thousand, five hundred thirty-two".