215853252 has 48 divisors (see below), whose sum is σ = 527235072. Its totient is φ = 68603040.

The previous prime is 215853191. The next prime is 215853257. The reversal of 215853252 is 252358512.

215853252 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (215853257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100227 + ... + 102357.

It is an arithmetic number, because the mean of its divisors is an integer number (10984064).

Almost surely, 2^215853252 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 215853252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263617536).

215853252 is an abundant number, since it is smaller than the sum of its proper divisors (311381820).

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

215853252 is a wasteful number, since it uses less digits than its factorization.

215853252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528 (or 2526 counting only the distinct ones).

The product of its digits is 24000, while the sum is 33.

The square root of 215853252 is about 14691.9451401099. The cubic root of 215853252 is about 599.8640914393.

The spelling of 215853252 in words is "two hundred fifteen million, eight hundred fifty-three thousand, two hundred fifty-two".