216732 has 12 divisors (see below), whose sum is σ = 505736. Its totient is φ = 72240.

The previous prime is 216731. The next prime is 216743. The reversal of 216732 is 237612.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 216699 and 216708.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216732.

It is not an unprimeable number, because it can be changed into a prime (216731) 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, 9019 + ... + 9042.

2²¹⁶⁷³² is an apocalyptic number.

It is an amenable number.

216732 is an abundant number, since it is smaller than the sum of its proper divisors (289004).

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

216732 is a wasteful number, since it uses less digits than its factorization.

216732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18068 (or 18066 counting only the distinct ones).

The product of its digits is 504, while the sum is 21.

The square root of 216732 is about 465.5448420936. The cubic root of 216732 is about 60.0677013578.

The spelling of 216732 in words is "two hundred sixteen thousand, seven hundred thirty-two".