220239587 has 4 divisors (see below), whose sum is σ = 222893160. Its totient is φ = 217586016.

The previous prime is 220239563. The next prime is 220239661. The reversal of 220239587 is 785932022.

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 220239587 - 2²² = 216045283 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220239587.

It is not an unprimeable number, because it can be changed into a prime (220239517) 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 3 ways as a sum of consecutive naturals, for example, 1326662 + ... + 1326827.

It is an arithmetic number, because the mean of its divisors is an integer number (55723290).

Almost surely, 2^220239587 is an apocalyptic number.

220239587 is a deficient number, since it is larger than the sum of its proper divisors (2653573).

220239587 is an equidigital number, since it uses as much as digits as its factorization.

220239587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653572.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 220239587 is about 14840.4712526254. The cubic root of 220239587 is about 603.9001368092.

The spelling of 220239587 in words is "two hundred twenty million, two hundred thirty-nine thousand, five hundred eighty-seven".