52218864 has 40 divisors (see below), whose sum is σ = 149888720. Its totient is φ = 17406144.

The previous prime is 52218863. The next prime is 52218893. The reversal of 52218864 is 46881225.

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 (52218863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60007 + ... + 60870.

It is an arithmetic number, because the mean of its divisors is an integer number (3747218).

Almost surely, 2^52218864 is an apocalyptic number.

52218864 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

52218864 is an abundant number, since it is smaller than the sum of its proper divisors (97669856).

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

52218864 is a wasteful number, since it uses less digits than its factorization.

52218864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120894 (or 120882 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 52218864 is about 7226.2621042971. The cubic root of 52218864 is about 373.7740444556.

The spelling of 52218864 in words is "fifty-two million, two hundred eighteen thousand, eight hundred sixty-four".