222912289 has 16 divisors (see below), whose sum is σ = 235284480. Its totient is φ = 210919680.

The previous prime is 222912259. The next prime is 222912293. The reversal of 222912289 is 982219222.

222912289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 222912289 - 2⁵ = 222912257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222912229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309672 + ... + 310390.

It is an arithmetic number, because the mean of its divisors is an integer number (14705280).

Almost surely, 2^222912289 is an apocalyptic number.

It is an amenable number.

222912289 is a deficient number, since it is larger than the sum of its proper divisors (12372191).

222912289 is a wasteful number, since it uses less digits than its factorization.

222912289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960.

The product of its digits is 20736, while the sum is 37.

The square root of 222912289 is about 14930.2474527384. The cubic root of 222912289 is about 606.3331836969. Note that the first 3 decimals are identical.

The spelling of 222912289 in words is "two hundred twenty-two million, nine hundred twelve thousand, two hundred eighty-nine".