220887585 has 24 divisors (see below), whose sum is σ = 383460480. Its totient is φ = 117625632.

The previous prime is 220887581. The next prime is 220887593. The reversal of 220887585 is 585788022.

It is not a de Polignac number, because 220887585 - 2² = 220887581 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 220887585.

It is not an unprimeable number, because it can be changed into a prime (220887581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28942 + ... + 35768.

It is an arithmetic number, because the mean of its divisors is an integer number (15977520).

Almost surely, 2^220887585 is an apocalyptic number.

It is an amenable number.

220887585 is a deficient number, since it is larger than the sum of its proper divisors (162572895).

220887585 is a wasteful number, since it uses less digits than its factorization.

220887585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7557 (or 7554 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 45.

The square root of 220887585 is about 14862.2873407830. The cubic root of 220887585 is about 604.4918301863.

The spelling of 220887585 in words is "two hundred twenty million, eight hundred eighty-seven thousand, five hundred eighty-five".