218332056 has 16 divisors (see below), whose sum is σ = 545830200. Its totient is φ = 72777344.

The previous prime is 218332019. The next prime is 218332057. The reversal of 218332056 is 650233812.

218332056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218332057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4548561 + ... + 4548608.

Almost surely, 2^218332056 is an apocalyptic number.

It is an amenable number.

218332056 is an abundant number, since it is smaller than the sum of its proper divisors (327498144).

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

218332056 is a wasteful number, since it uses less digits than its factorization.

218332056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9097178 (or 9097174 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 218332056 is about 14776.0636165387. The cubic root of 218332056 is about 602.1515863488.

Adding to 218332056 its reverse (650233812), we get a palindrome (868565868).

The spelling of 218332056 in words is "two hundred eighteen million, three hundred thirty-two thousand, fifty-six".