222605231 has 2 divisors, whose sum is σ = 222605232. Its totient is φ = 222605230.

The previous prime is 222605221. The next prime is 222605239. The reversal of 222605231 is 132506222.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222605231 is a prime.

It is a super-2 number, since 2×222605231² = 99106177737126722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 222605197 and 222605206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222605239) 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 as a sum of consecutive naturals, namely, 111302615 + 111302616.

It is an arithmetic number, because the mean of its divisors is an integer number (111302616).

Almost surely, 2^222605231 is an apocalyptic number.

222605231 is a deficient number, since it is larger than the sum of its proper divisors (1).

222605231 is an equidigital number, since it uses as much as digits as its factorization.

222605231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 222605231 is about 14919.9608243454. The cubic root of 222605231 is about 606.0546511144.

Subtracting from 222605231 its reverse (132506222), we obtain a palindrome (90099009).

The spelling of 222605231 in words is "two hundred twenty-two million, six hundred five thousand, two hundred thirty-one".