216442994 has 8 divisors (see below), whose sum is σ = 332214960. Its totient is φ = 105704676.

The previous prime is 216442981. The next prime is 216442999. The reversal of 216442994 is 499244612.

216442994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (216442999) 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, 1258304 + ... + 1258475.

It is an arithmetic number, because the mean of its divisors is an integer number (41526870).

Almost surely, 2^216442994 is an apocalyptic number.

216442994 is a deficient number, since it is larger than the sum of its proper divisors (115771966).

216442994 is a wasteful number, since it uses less digits than its factorization.

216442994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516824.

The product of its digits is 124416, while the sum is 41.

The square root of 216442994 is about 14712.0016992930. The cubic root of 216442994 is about 600.4098995365.

The spelling of 216442994 in words is "two hundred sixteen million, four hundred forty-two thousand, nine hundred ninety-four".