220645559 has 4 divisors (see below), whose sum is σ = 226027200. Its totient is φ = 215263920.

The previous prime is 220645553. The next prime is 220645561. The reversal of 220645559 is 955546022.

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

It is a cyclic number.

It is not a de Polignac number, because 220645559 - 2⁸ = 220645303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220645553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2690759 + ... + 2690840.

It is an arithmetic number, because the mean of its divisors is an integer number (56506800).

Almost surely, 2^220645559 is an apocalyptic number.

220645559 is a deficient number, since it is larger than the sum of its proper divisors (5381641).

220645559 is an equidigital number, since it uses as much as digits as its factorization.

220645559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5381640.

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 220645559 is about 14854.1428227953. The cubic root of 220645559 is about 604.2709694157.

The spelling of 220645559 in words is "two hundred twenty million, six hundred forty-five thousand, five hundred fifty-nine".