252218684 has 12 divisors (see below), whose sum is σ = 456603000. Its totient is φ = 121760688.

The previous prime is 252218671. The next prime is 252218689. The reversal of 252218684 is 486812252.

It is a super-2 number, since 2×252218684² = 127228529117383712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252218689) 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 3 ways as a sum of consecutive naturals, for example, 1087034 + ... + 1087265.

It is an arithmetic number, because the mean of its divisors is an integer number (38050250).

Almost surely, 2^252218684 is an apocalyptic number.

It is an amenable number.

252218684 is a deficient number, since it is larger than the sum of its proper divisors (204384316).

252218684 is a wasteful number, since it uses less digits than its factorization.

252218684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174332 (or 2174330 counting only the distinct ones).

The product of its digits is 61440, while the sum is 38.

The square root of 252218684 is about 15881.3942712849. The cubic root of 252218684 is about 631.8186168314.

The spelling of 252218684 in words is "two hundred fifty-two million, two hundred eighteen thousand, six hundred eighty-four".