218051055 has 32 divisors (see below), whose sum is σ = 400158720. Its totient is φ = 112540320.

The previous prime is 218051051. The next prime is 218051069. The reversal of 218051055 is 550150812.

218051055 is a `hidden beast` number, since 21 + 80 + 510 + 55 = 666.

It is not a de Polignac number, because 218051055 - 2² = 218051051 is a prime.

It is a super-2 number, since 2×218051055² = 95092525173226050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218051051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21867 + ... + 30236.

It is an arithmetic number, because the mean of its divisors is an integer number (12504960).

Almost surely, 2^218051055 is an apocalyptic number.

218051055 is a deficient number, since it is larger than the sum of its proper divisors (182107665).

218051055 is a wasteful number, since it uses less digits than its factorization.

218051055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52148 (or 52142 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 218051055 is about 14766.5518994788. The cubic root of 218051055 is about 601.8931453851.

It can be divided in two parts, 2180 and 51055, that added together give a palindrome (53235).

The spelling of 218051055 in words is "two hundred eighteen million, fifty-one thousand, fifty-five".