216513432 has 32 divisors (see below), whose sum is σ = 601426800. Its totient is φ = 72171072.

The previous prime is 216513419. The next prime is 216513433. The reversal of 216513432 is 234315612.

216513432 is a `hidden beast` number, since 2 + 1 + 651 + 3 + 4 + 3 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 216513396 and 216513405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216513433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500973 + ... + 501404.

Almost surely, 2^216513432 is an apocalyptic number.

It is an amenable number.

216513432 is an abundant number, since it is smaller than the sum of its proper divisors (384913368).

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

216513432 is a wasteful number, since it uses less digits than its factorization.

216513432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002392 (or 1002382 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 216513432 is about 14714.3954004234. The cubic root of 216513432 is about 600.4750238214.

The spelling of 216513432 in words is "two hundred sixteen million, five hundred thirteen thousand, four hundred thirty-two".