220863665 has 16 divisors (see below), whose sum is σ = 292118400. Its totient is φ = 158968320.

The previous prime is 220863661. The next prime is 220863673. The reversal of 220863665 is 566368022.

It is not a de Polignac number, because 220863665 - 2² = 220863661 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (220863661) 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 15 ways as a sum of consecutive naturals, for example, 15365 + ... + 26034.

It is an arithmetic number, because the mean of its divisors is an integer number (18257400).

Almost surely, 2^220863665 is an apocalyptic number.

It is an amenable number.

220863665 is a deficient number, since it is larger than the sum of its proper divisors (71254735).

220863665 is a wasteful number, since it uses less digits than its factorization.

220863665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41512.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 220863665 is about 14861.4825976415. The cubic root of 220863665 is about 604.4700091825.

The spelling of 220863665 in words is "two hundred twenty million, eight hundred sixty-three thousand, six hundred sixty-five".