252218685 has 32 divisors (see below), whose sum is σ = 413724672. Its totient is φ = 131147840.

The previous prime is 252218671. The next prime is 252218689. The reversal of 252218685 is 586812252.

252218685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 252218685 - 2⁴ = 252218669 is a prime.

It is a super-2 number, since 2×252218685² = 127228530126258450, which contains 22 as substring.

It is a Curzon number.

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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 244120 + ... + 245150.

It is an arithmetic number, because the mean of its divisors is an integer number (12928896).

Almost surely, 2^252218685 is an apocalyptic number.

It is an amenable number.

252218685 is a deficient number, since it is larger than the sum of its proper divisors (161505987).

252218685 is a wasteful number, since it uses less digits than its factorization.

252218685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433.

The product of its digits is 76800, while the sum is 39.

The square root of 252218685 is about 15881.3943027683. The cubic root of 252218685 is about 631.8186176665.

The spelling of 252218685 in words is "two hundred fifty-two million, two hundred eighteen thousand, six hundred eighty-five".