222431329 has 2 divisors, whose sum is σ = 222431330. Its totient is φ = 222431328.

The previous prime is 222431327. The next prime is 222431351. The reversal of 222431329 is 923134222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219632400 + 2798929 = 14820^2 + 1673^2 .

It is a cyclic number.

It is not a de Polignac number, because 222431329 - 2¹ = 222431327 is a prime.

It is a super-2 number, since 2×222431329² = 98951392241412482, which contains 22 as substring.

Together with 222431327, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 222431297 and 222431306.

It is not a weakly prime, because it can be changed into another prime (222431327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111215664 + 111215665.

It is an arithmetic number, because the mean of its divisors is an integer number (111215665).

Almost surely, 2^222431329 is an apocalyptic number.

It is an amenable number.

222431329 is a deficient number, since it is larger than the sum of its proper divisors (1).

222431329 is an equidigital number, since it uses as much as digits as its factorization.

222431329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 28.

The square root of 222431329 is about 14914.1318553914. The cubic root of 222431329 is about 605.8967908334.

The spelling of 222431329 in words is "two hundred twenty-two million, four hundred thirty-one thousand, three hundred twenty-nine".