222123439 has 2 divisors, whose sum is σ = 222123440. Its totient is φ = 222123438.

The previous prime is 222123437. The next prime is 222123449. The reversal of 222123439 is 934321222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222123439 - 2¹ = 222123437 is a prime.

Together with 222123437, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222123437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111061719 + 111061720.

It is an arithmetic number, because the mean of its divisors is an integer number (111061720).

Almost surely, 2^222123439 is an apocalyptic number.

222123439 is a deficient number, since it is larger than the sum of its proper divisors (1).

222123439 is an equidigital number, since it uses as much as digits as its factorization.

222123439 is an evil number, because the sum of its binary digits is even.

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

The square root of 222123439 is about 14903.8061917082. The cubic root of 222123439 is about 605.6171004617.

It can be divided in two parts, 22212 and 3439, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 222123439 in words is "two hundred twenty-two million, one hundred twenty-three thousand, four hundred thirty-nine".