252057218 has 32 divisors (see below), whose sum is σ = 447482880. Its totient is φ = 104201280.

The previous prime is 252057199. The next prime is 252057227. The reversal of 252057218 is 812750252.

It is a happy number.

It is a super-2 number, since 2×252057218² = 127065682291799048, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168080 + ... + 169572.

It is an arithmetic number, because the mean of its divisors is an integer number (13983840).

Almost surely, 2^252057218 is an apocalyptic number.

252057218 is a deficient number, since it is larger than the sum of its proper divisors (195425662).

252057218 is a wasteful number, since it uses less digits than its factorization.

252057218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 252057218 is about 15876.3099617008. The cubic root of 252057218 is about 631.6837616325.

It can be divided in two parts, 25205 and 7218, that added together give a palindrome (32423).

The spelling of 252057218 in words is "two hundred fifty-two million, fifty-seven thousand, two hundred eighteen".