216890222 has 8 divisors (see below), whose sum is σ = 325398000. Its totient is φ = 108424224.

The previous prime is 216890221. The next prime is 216890239. The reversal of 216890222 is 222098612.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216890221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13679 + ... + 24917.

It is an arithmetic number, because the mean of its divisors is an integer number (40674750).

Almost surely, 2^216890222 is an apocalyptic number.

216890222 is a deficient number, since it is larger than the sum of its proper divisors (108507778).

216890222 is a wasteful number, since it uses less digits than its factorization.

216890222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20890.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 216890222 is about 14727.1932831752. The cubic root of 216890222 is about 600.8231498205.

The spelling of 216890222 in words is "two hundred sixteen million, eight hundred ninety thousand, two hundred twenty-two".