218057056 has 36 divisors (see below), whose sum is σ = 499393188. Its totient is φ = 93452352.

The previous prime is 218057023. The next prime is 218057057. The reversal of 218057056 is 650750812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218057057) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67966 + ... + 71101.

It is an arithmetic number, because the mean of its divisors is an integer number (13872033).

Almost surely, 2^218057056 is an apocalyptic number.

It is an amenable number.

218057056 is an abundant number, since it is smaller than the sum of its proper divisors (281336132).

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

218057056 is a wasteful number, since it uses less digits than its factorization.

218057056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139091 (or 139076 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 218057056 is about 14766.7550937909. The cubic root of 218057056 is about 601.8986669171.

The spelling of 218057056 in words is "two hundred eighteen million, fifty-seven thousand, fifty-six".