218012256 has 384 divisors, whose sum is σ = 827366400. Its totient is φ = 54190080.

The previous prime is 218012191. The next prime is 218012281. The reversal of 218012256 is 652210812.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1929256 + ... + 1929368.

It is an arithmetic number, because the mean of its divisors is an integer number (2154600).

Almost surely, 2^218012256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218012256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (413683200).

218012256 is an abundant number, since it is smaller than the sum of its proper divisors (609354144).

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

218012256 is a wasteful number, since it uses less digits than its factorization.

218012256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 218012256 is about 14765.2380949309. The cubic root of 218012256 is about 601.8574439032.

The spelling of 218012256 in words is "two hundred eighteen million, twelve thousand, two hundred fifty-six".