216532 has 6 divisors (see below), whose sum is σ = 378938. Its totient is φ = 108264.

The previous prime is 216523. The next prime is 216551. The reversal of 216532 is 235612.

It is a happy number.

216532 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in only one way, i.e., 111556 + 104976 = 334^2 + 324^2 .

It is a super-2 number, since 2×216532² = 93772214048, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27063 + ... + 27070.

2²¹⁶⁵³² is an apocalyptic number.

It is an amenable number.

216532 is a deficient number, since it is larger than the sum of its proper divisors (162406).

216532 is a wasteful number, since it uses less digits than its factorization.

216532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54137 (or 54135 counting only the distinct ones).

The product of its digits is 360, while the sum is 19.

The square root of 216532 is about 465.3299904369. The cubic root of 216532 is about 60.0492188733.

It can be divided in two parts, 2165 and 32, that added together give a cube (2197 = 13³).

The spelling of 216532 in words is "two hundred sixteen thousand, five hundred thirty-two".