222220331 has 2 divisors, whose sum is σ = 222220332. Its totient is φ = 222220330.

The previous prime is 222220309. The next prime is 222220343. The reversal of 222220331 is 133022222.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222220331 is a prime.

It is a super-2 number, since 2×222220331² = 98763751019499122, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (222225331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111110165 + 111110166.

It is an arithmetic number, because the mean of its divisors is an integer number (111110166).

Almost surely, 2^222220331 is an apocalyptic number.

222220331 is a deficient number, since it is larger than the sum of its proper divisors (1).

222220331 is an equidigital number, since it uses as much as digits as its factorization.

222220331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 222220331 is about 14907.0564163419. The cubic root of 222220331 is about 605.7051459831.

Adding to 222220331 its reverse (133022222), we get a palindrome (355242553).

The spelling of 222220331 in words is "two hundred twenty-two million, two hundred twenty thousand, three hundred thirty-one".