215532252 has 144 divisors (see below), whose sum is σ = 626257632. Its totient is φ = 64385280.

The previous prime is 215532227. The next prime is 215532253. The reversal of 215532252 is 252235512.

215532252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215532253) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 467302 + ... + 467762.

Almost surely, 2^215532252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215532252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313128816).

215532252 is an abundant number, since it is smaller than the sum of its proper divisors (410725380).

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

215532252 is a wasteful number, since it uses less digits than its factorization.

215532252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 516 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 215532252 is about 14681.0167222846. The cubic root of 215532252 is about 599.5665869973.

Adding to 215532252 its reverse (252235512), we get a palindrome (467767764).

The spelling of 215532252 in words is "two hundred fifteen million, five hundred thirty-two thousand, two hundred fifty-two".