222661505 has 16 divisors (see below), whose sum is σ = 304159104. Its totient is φ = 154894080.

The previous prime is 222661489. The next prime is 222661511. The reversal of 222661505 is 505166222.

It is not a de Polignac number, because 222661505 - 2⁴ = 222661489 is a prime.

It is a Duffinian 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, 86744 + ... + 89273.

It is an arithmetic number, because the mean of its divisors is an integer number (19009944).

Almost surely, 2^222661505 is an apocalyptic number.

It is an amenable number.

222661505 is a deficient number, since it is larger than the sum of its proper divisors (81497599).

222661505 is a wasteful number, since it uses less digits than its factorization.

222661505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176056.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 222661505 is about 14921.8465680357. The cubic root of 222661505 is about 606.1057164702.

The spelling of 222661505 in words is "two hundred twenty-two million, six hundred sixty-one thousand, five hundred five".