218660052 has 96 divisors (see below), whose sum is σ = 596260224. Its totient is φ = 61747200.

The previous prime is 218659997. The next prime is 218660059. The reversal of 218660052 is 250066812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218660059) 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 31 ways as a sum of consecutive naturals, for example, 107727 + ... + 109737.

It is an arithmetic number, because the mean of its divisors is an integer number (6211044).

Almost surely, 2^218660052 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218660052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298130112).

218660052 is an abundant number, since it is smaller than the sum of its proper divisors (377600172).

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

218660052 is a wasteful number, since it uses less digits than its factorization.

218660052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2089 (or 2087 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 218660052 is about 14787.1583477016. The cubic root of 218660052 is about 602.4529690164.

The spelling of 218660052 in words is "two hundred eighteen million, six hundred sixty thousand, fifty-two".