216944242 has 32 divisors (see below), whose sum is σ = 363960000. Its totient is φ = 96380928.

The previous prime is 216944227. The next prime is 216944251. The reversal of 216944242 is 242449612.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 216944198 and 216944207.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322018 + ... + 322690.

It is an arithmetic number, because the mean of its divisors is an integer number (11373750).

Almost surely, 2^216944242 is an apocalyptic number.

216944242 is a deficient number, since it is larger than the sum of its proper divisors (147015758).

216944242 is a wasteful number, since it uses less digits than its factorization.

216944242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210.

The product of its digits is 27648, while the sum is 34.

The square root of 216944242 is about 14729.0271912302. The cubic root of 216944242 is about 600.8730272378.

The spelling of 216944242 in words is "two hundred sixteen million, nine hundred forty-four thousand, two hundred forty-two".