220581465 has 32 divisors (see below), whose sum is σ = 381749760. Its totient is φ = 108116736.

The previous prime is 220581433. The next prime is 220581479. The reversal of 220581465 is 564185022.

It is not a de Polignac number, because 220581465 - 2⁵ = 220581433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44239 + ... + 48971.

It is an arithmetic number, because the mean of its divisors is an integer number (11929680).

Almost surely, 2^220581465 is an apocalyptic number.

It is an amenable number.

220581465 is a deficient number, since it is larger than the sum of its proper divisors (161168295).

220581465 is a wasteful number, since it uses less digits than its factorization.

220581465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4993.

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 220581465 is about 14851.9852208383. The cubic root of 220581465 is about 604.2124534041.

The spelling of 220581465 in words is "two hundred twenty million, five hundred eighty-one thousand, four hundred sixty-five".