220381559 has 4 divisors (see below), whose sum is σ = 223670904. Its totient is φ = 217092216.

The previous prime is 220381549. The next prime is 220381597. The reversal of 220381559 is 955183022.

220381559 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 220381559 - 2¹⁶ = 220316023 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 (220381549) 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, 1644572 + ... + 1644705.

It is an arithmetic number, because the mean of its divisors is an integer number (55917726).

Almost surely, 2^220381559 is an apocalyptic number.

220381559 is a deficient number, since it is larger than the sum of its proper divisors (3289345).

220381559 is an equidigital number, since it uses as much as digits as its factorization.

220381559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289344.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 220381559 is about 14845.2537533045. The cubic root of 220381559 is about 604.0298720296.

The spelling of 220381559 in words is "two hundred twenty million, three hundred eighty-one thousand, five hundred fifty-nine".