222655690 has 8 divisors (see below), whose sum is σ = 400780260. Its totient is φ = 89062272.

The previous prime is 222655687. The next prime is 222655721. The reversal of 222655690 is 96556222.

222655690 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 179372449 + 43283241 = 13393^2 + 6579^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×222655690² = 99151112578752200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11132775 + ... + 11132794.

Almost surely, 2^222655690 is an apocalyptic number.

222655690 is a deficient number, since it is larger than the sum of its proper divisors (178124570).

222655690 is a wasteful number, since it uses less digits than its factorization.

222655690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22265576.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 222655690 is about 14921.6517182248. The cubic root of 222655690 is about 606.1004400972.

The spelling of 222655690 in words is "two hundred twenty-two million, six hundred fifty-five thousand, six hundred ninety".