252218808 has 24 divisors (see below), whose sum is σ = 683092800. Its totient is φ = 84072912.

The previous prime is 252218807. The next prime is 252218809. The reversal of 252218808 is 808812252.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (252218807) and next prime (252218809).

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×252218808² = 127228654217881728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252218803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1751448 + ... + 1751591.

It is an arithmetic number, because the mean of its divisors is an integer number (28462200).

Almost surely, 2^252218808 is an apocalyptic number.

It is an amenable number.

252218808 is an abundant number, since it is smaller than the sum of its proper divisors (430873992).

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

252218808 is a wasteful number, since it uses less digits than its factorization.

252218808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3503051 (or 3503044 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 252218808 is about 15881.3981752237. The cubic root of 252218808 is about 631.8187203732.

The spelling of 252218808 in words is "two hundred fifty-two million, two hundred eighteen thousand, eight hundred eight".