215652 has 12 divisors (see below), whose sum is σ = 503216. Its totient is φ = 71880.

The previous prime is 215617. The next prime is 215653. The reversal of 215652 is 256512.

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

It is not an unprimeable number, because it can be changed into a prime (215653) by changing a digit.

215652 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8974 + ... + 8997.

2²¹⁵⁶⁵² is an apocalyptic number.

It is an amenable number.

215652 is an abundant number, since it is smaller than the sum of its proper divisors (287564).

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

215652 is a wasteful number, since it uses less digits than its factorization.

215652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17978 (or 17976 counting only the distinct ones).

The product of its digits is 600, while the sum is 21.

The square root of 215652 is about 464.3834622378. The cubic root of 215652 is about 59.9677604577.

The spelling of 215652 in words is "two hundred fifteen thousand, six hundred fifty-two".