218392055 has 48 divisors (see below), whose sum is σ = 318776832. Its totient is φ = 140616000.

The previous prime is 218392051. The next prime is 218392067. The reversal of 218392055 is 550293812.

It is not a de Polignac number, because 218392055 - 2² = 218392051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218392051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1446230 + ... + 1446380.

It is an arithmetic number, because the mean of its divisors is an integer number (6641184).

Almost surely, 2^218392055 is an apocalyptic number.

218392055 is a deficient number, since it is larger than the sum of its proper divisors (100384777).

218392055 is a wasteful number, since it uses less digits than its factorization.

218392055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 218392055 is about 14778.0937539319. The cubic root of 218392055 is about 602.2067396243.

The spelling of 218392055 in words is "two hundred eighteen million, three hundred ninety-two thousand, fifty-five".