52687218 has 16 divisors (see below), whose sum is σ = 105965280. Its totient is φ = 17463936.

The previous prime is 52687213. The next prime is 52687231. The reversal of 52687218 is 81278625.

It is not an unprimeable number, because it can be changed into a prime (52687211) 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, 23455 + ... + 25602.

It is an arithmetic number, because the mean of its divisors is an integer number (6622830).

Almost surely, 2^52687218 is an apocalyptic number.

52687218 is an abundant number, since it is smaller than the sum of its proper divisors (53278062).

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

52687218 is a wasteful number, since it uses less digits than its factorization.

52687218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49241.

The product of its digits is 53760, while the sum is 39.

The square root of 52687218 is about 7258.5961452611. The cubic root of 52687218 is about 374.8881871088. Note that the first 3 decimals are identical.

The spelling of 52687218 in words is "fifty-two million, six hundred eighty-seven thousand, two hundred eighteen".