216165632 has 36 divisors (see below), whose sum is σ = 432428640. Its totient is φ = 107847168.

The previous prime is 216165613. The next prime is 216165637. The reversal of 216165632 is 236561612.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216165637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219413 + ... + 220395.

Almost surely, 2^216165632 is an apocalyptic number.

It is an amenable number.

216165632 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

216165632 is an frugal number, since it uses more digits than its factorization.

216165632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858 (or 1844 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 216165632 is about 14702.5722919495. The cubic root of 216165632 is about 600.1533237793.

The spelling of 216165632 in words is "two hundred sixteen million, one hundred sixty-five thousand, six hundred thirty-two".