215532 has 18 divisors (see below), whose sum is σ = 544908. Its totient is φ = 71832.

The previous prime is 215531. The next prime is 215563. The reversal of 215532 is 235512.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (215531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2958 + ... + 3029.

2²¹⁵⁵³² is an apocalyptic number.

It is an amenable number.

215532 is an abundant number, since it is smaller than the sum of its proper divisors (329376).

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

215532 is a wasteful number, since it uses less digits than its factorization.

215532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5997 (or 5992 counting only the distinct ones).

The product of its digits is 300, while the sum is 18.

The square root of 215532 is about 464.2542406915. The cubic root of 215532 is about 59.9566353326.

It can be divided in two parts, 2155 and 32, that added together give a 7-th power (2187 = 3⁷).

The spelling of 215532 in words is "two hundred fifteen thousand, five hundred thirty-two".