222857939 has 2 divisors, whose sum is σ = 222857940. Its totient is φ = 222857938.

The previous prime is 222857923. The next prime is 222857969. The reversal of 222857939 is 939758222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222857939 - 2⁴ = 222857923 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 222857893 and 222857902.

It is not a weakly prime, because it can be changed into another prime (222857969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111428969 + 111428970.

It is an arithmetic number, because the mean of its divisors is an integer number (111428970).

Almost surely, 2^222857939 is an apocalyptic number.

222857939 is a deficient number, since it is larger than the sum of its proper divisors (1).

222857939 is an equidigital number, since it uses as much as digits as its factorization.

222857939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The square root of 222857939 is about 14928.4272111968. The cubic root of 222857939 is about 606.2839014025.

The spelling of 222857939 in words is "two hundred twenty-two million, eight hundred fifty-seven thousand, nine hundred thirty-nine".