216224990 has 16 divisors (see below), whose sum is σ = 389372400. Its totient is φ = 86452800.

The previous prime is 216224977. The next prime is 216225011. The reversal of 216224990 is 99422612.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 216224990.

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, 44165 + ... + 48815.

It is an arithmetic number, because the mean of its divisors is an integer number (24335775).

Almost surely, 2^216224990 is an apocalyptic number.

216224990 is a deficient number, since it is larger than the sum of its proper divisors (173147410).

216224990 is a wasteful number, since it uses less digits than its factorization.

216224990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9307.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 216224990 is about 14704.5907797531. The cubic root of 216224990 is about 600.2082517844.

The spelling of 216224990 in words is "two hundred sixteen million, two hundred twenty-four thousand, nine hundred ninety".