218414180 has 24 divisors (see below), whose sum is σ = 459808440. Its totient is φ = 87148800.

The previous prime is 218414173. The next prime is 218414201. The reversal of 218414180 is 81414812.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19998784 + 198415396 = 4472^2 + 14086^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5171 + ... + 21530.

It is an arithmetic number, because the mean of its divisors is an integer number (19158685).

Almost surely, 2^218414180 is an apocalyptic number.

218414180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218414180 is an abundant number, since it is smaller than the sum of its proper divisors (241394260).

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

218414180 is a wasteful number, since it uses less digits than its factorization.

218414180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27119 (or 27117 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 218414180 is about 14778.8423091932. The cubic root of 218414180 is about 602.2270751843.

Adding to 218414180 its reverse (81414812), we get a palindrome (299828992).

The spelling of 218414180 in words is "two hundred eighteen million, four hundred fourteen thousand, one hundred eighty".