252215656 has 32 divisors (see below), whose sum is σ = 589596480. Its totient is φ = 98265600.

The previous prime is 252215651. The next prime is 252215699. The reversal of 252215656 is 656512252.

It is a super-2 number, since 2×252215656² = 127225474263020672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (252215651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204105 + ... + 205336.

It is an arithmetic number, because the mean of its divisors is an integer number (18424890).

Almost surely, 2^252215656 is an apocalyptic number.

It is an amenable number.

252215656 is an abundant number, since it is smaller than the sum of its proper divisors (337380824).

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

252215656 is a wasteful number, since it uses less digits than its factorization.

252215656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409465 (or 409461 counting only the distinct ones).

The product of its digits is 36000, while the sum is 34.

The square root of 252215656 is about 15881.2989393185. The cubic root of 252215656 is about 631.8160883980.

The spelling of 252215656 in words is "two hundred fifty-two million, two hundred fifteen thousand, six hundred fifty-six".