220659994 has 4 divisors (see below), whose sum is σ = 330989994. Its totient is φ = 110329996.

The previous prime is 220659973. The next prime is 220660007. The reversal of 220659994 is 499956022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 199176769 + 21483225 = 14113^2 + 4635^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55164997 + ... + 55165000.

Almost surely, 2^220659994 is an apocalyptic number.

220659994 is a deficient number, since it is larger than the sum of its proper divisors (110330000).

220659994 is a wasteful number, since it uses less digits than its factorization.

220659994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110329999.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 220659994 is about 14854.6287062316. The cubic root of 220659994 is about 604.2841465994.

The spelling of 220659994 in words is "two hundred twenty million, six hundred fifty-nine thousand, nine hundred ninety-four".