222661305 has 40 divisors (see below), whose sum is σ = 402154632. Its totient is φ = 117856512.

The previous prime is 222661289. The next prime is 222661319. The reversal of 222661305 is 503166222.

222661305 is a `hidden beast` number, since 22 + 26 + 613 + 0 + 5 = 666.

222661305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 61168041 + 161493264 = 7821^2 + 12708^2 .

It is not a de Polignac number, because 222661305 - 2⁴ = 222661289 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 53479 + ... + 57491.

Almost surely, 2^222661305 is an apocalyptic number.

It is an amenable number.

222661305 is a deficient number, since it is larger than the sum of its proper divisors (179493327).

222661305 is a wasteful number, since it uses less digits than its factorization.

222661305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4167 (or 4158 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 222661305 is about 14921.8398664508. The cubic root of 222661305 is about 606.1055349971.

The spelling of 222661305 in words is "two hundred twenty-two million, six hundred sixty-one thousand, three hundred five".