216998222 has 16 divisors (see below), whose sum is σ = 372916320. Its totient is φ = 92769408.

The previous prime is 216998219. The next prime is 216998291. The reversal of 216998222 is 222899612.

It is a super-2 number, since 2×216998222² = 94176456702322568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216998222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13223 + ... + 24674.

It is an arithmetic number, because the mean of its divisors is an integer number (23307270).

Almost surely, 2^216998222 is an apocalyptic number.

216998222 is a deficient number, since it is larger than the sum of its proper divisors (155918098).

216998222 is a wasteful number, since it uses less digits than its factorization.

216998222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38315.

The product of its digits is 62208, while the sum is 41.

The square root of 216998222 is about 14730.8595132803. The cubic root of 216998222 is about 600.9228594526.

The spelling of 216998222 in words is "two hundred sixteen million, nine hundred ninety-eight thousand, two hundred twenty-two".