220665285 has 48 divisors (see below), whose sum is σ = 396864000. Its totient is φ = 113304960.

The previous prime is 220665271. The next prime is 220665311. The reversal of 220665285 is 582566022.

220665285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220665285 - 2¹¹ = 220663237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 441966 + ... + 442464.

It is an arithmetic number, because the mean of its divisors is an integer number (8268000).

Almost surely, 2^220665285 is an apocalyptic number.

It is an amenable number.

220665285 is a deficient number, since it is larger than the sum of its proper divisors (176198715).

220665285 is a wasteful number, since it uses less digits than its factorization.

220665285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858 (or 855 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 220665285 is about 14854.8067978012. The cubic root of 220665285 is about 604.2889764160.

The spelling of 220665285 in words is "two hundred twenty million, six hundred sixty-five thousand, two hundred eighty-five".