222646231 has 4 divisors (see below), whose sum is σ = 222763464. Its totient is φ = 222529000.

The previous prime is 222646223. The next prime is 222646243. The reversal of 222646231 is 132646222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 222646231 - 2³ = 222646223 is a prime.

It is a super-2 number, since 2×222646231² = 99142688357010722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222646231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222626231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55720 + ... + 59581.

It is an arithmetic number, because the mean of its divisors is an integer number (55690866).

Almost surely, 2^222646231 is an apocalyptic number.

222646231 is a deficient number, since it is larger than the sum of its proper divisors (117233).

222646231 is a wasteful number, since it uses less digits than its factorization.

222646231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117232.

The product of its digits is 6912, while the sum is 28.

The square root of 222646231 is about 14921.3347593303. The cubic root of 222646231 is about 606.0918570614.

Subtracting from 222646231 its reverse (132646222), we obtain a palindrome (90000009).

The spelling of 222646231 in words is "two hundred twenty-two million, six hundred forty-six thousand, two hundred thirty-one".