52218818 has 24 divisors (see below), whose sum is σ = 82041660. Its totient is φ = 24924000.

The previous prime is 52218811. The next prime is 52218823. The reversal of 52218818 is 81881225.

52218818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 52171729 + 47089 = 7223^2 + 217^2 .

It is not an unprimeable number, because it can be changed into a prime (52218811) 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 11 ways as a sum of consecutive naturals, for example, 193988 + ... + 194256.

Almost surely, 2^52218818 is an apocalyptic number.

52218818 is a deficient number, since it is larger than the sum of its proper divisors (29822842).

52218818 is a wasteful number, since it uses less digits than its factorization.

52218818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 403 counting only the distinct ones).

The product of its digits is 10240, while the sum is 35.

The square root of 52218818 is about 7226.2589214614. The cubic root of 52218818 is about 373.7739347021.

The spelling of 52218818 in words is "fifty-two million, two hundred eighteen thousand, eight hundred eighteen".