2160221998 has 16 divisors (see below), whose sum is σ = 3535625520. Its totient is φ = 981720000.

The previous prime is 2160221989. The next prime is 2160222007. The reversal of 2160221998 is 8991220612.

It is an interprime number because it is at equal distance from previous prime (2160221989) and next prime (2160222007).

It is a super-2 number, since 2×2160221998² = 9333118161286224008, 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 2160221998.

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, 192568 + ... + 203476.

It is an arithmetic number, because the mean of its divisors is an integer number (220976595).

Almost surely, 2^2160221998 is an apocalyptic number.

2160221998 is a deficient number, since it is larger than the sum of its proper divisors (1375403522).

2160221998 is a wasteful number, since it uses less digits than its factorization.

2160221998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19923.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 2160221998 is about 46478.1884113398. The cubic root of 2160221998 is about 1292.7050977050.

The spelling of 2160221998 in words is "two billion, one hundred sixty million, two hundred twenty-one thousand, nine hundred ninety-eight".