218157008 has 10 divisors (see below), whose sum is σ = 422679234. Its totient is φ = 109078496.

The previous prime is 218156989. The next prime is 218157011. The reversal of 218157008 is 800751812.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 211644304 + 6512704 = 14548^2 + 2552^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6817391 + ... + 6817422.

Almost surely, 2^218157008 is an apocalyptic number.

It is an amenable number.

218157008 is a deficient number, since it is larger than the sum of its proper divisors (204522226).

218157008 is a wasteful number, since it uses less digits than its factorization.

218157008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13634821 (or 13634815 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 218157008 is about 14770.1390650190. The cubic root of 218157008 is about 601.9906180589.

The spelling of 218157008 in words is "two hundred eighteen million, one hundred fifty-seven thousand, eight".