218154855 has 16 divisors (see below), whose sum is σ = 349745760. Its totient is φ = 116116608.

The previous prime is 218154841. The next prime is 218154857. The reversal of 218154855 is 558451812.

It is not a de Polignac number, because 218154855 - 2⁵ = 218154823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218154857) 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 15 ways as a sum of consecutive naturals, for example, 6652 + ... + 21921.

It is an arithmetic number, because the mean of its divisors is an integer number (21859110).

Almost surely, 2^218154855 is an apocalyptic number.

218154855 is a deficient number, since it is larger than the sum of its proper divisors (131590905).

218154855 is a wasteful number, since it uses less digits than its factorization.

218154855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29090.

The product of its digits is 64000, while the sum is 39.

The square root of 218154855 is about 14770.0661813006. The cubic root of 218154855 is about 601.9886376961.

The spelling of 218154855 in words is "two hundred eighteen million, one hundred fifty-four thousand, eight hundred fifty-five".