222566385 has 16 divisors (see below), whose sum is σ = 363684096. Its totient is φ = 116176128.

The previous prime is 222566347. The next prime is 222566401. The reversal of 222566385 is 583665222.

222566385 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 222566385 - 2⁹ = 222565873 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157144 + ... + 158553.

It is an arithmetic number, because the mean of its divisors is an integer number (22730256).

Almost surely, 2^222566385 is an apocalyptic number.

It is an amenable number.

222566385 is a deficient number, since it is larger than the sum of its proper divisors (141117711).

222566385 is a wasteful number, since it uses less digits than its factorization.

222566385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315752.

The product of its digits is 172800, while the sum is 39.

The square root of 222566385 is about 14918.6589544771. The cubic root of 222566385 is about 606.0193956258.

The spelling of 222566385 in words is "two hundred twenty-two million, five hundred sixty-six thousand, three hundred eighty-five".