215064252 has 72 divisors (see below), whose sum is σ = 589382976. Its totient is φ = 65729664.

The previous prime is 215064251. The next prime is 215064253. The reversal of 215064252 is 252460512.

215064252 is a `hidden beast` number, since 2 + 15 + 0 + 642 + 5 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (215064251) and next prime (215064253).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215064251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72013 + ... + 74939.

Almost surely, 2^215064252 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 215064252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294691488).

215064252 is an abundant number, since it is smaller than the sum of its proper divisors (374318724).

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

215064252 is a wasteful number, since it uses less digits than its factorization.

215064252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107 (or 3102 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 215064252 is about 14665.0691099633. The cubic root of 215064252 is about 599.1323124688.

The spelling of 215064252 in words is "two hundred fifteen million, sixty-four thousand, two hundred fifty-two".