222191923 has 2 divisors, whose sum is σ = 222191924. Its totient is φ = 222191922.

The previous prime is 222191903. The next prime is 222191933. The reversal of 222191923 is 329191222.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222191923 is a prime.

It is not a weakly prime, because it can be changed into another prime (222191903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111095961 + 111095962.

It is an arithmetic number, because the mean of its divisors is an integer number (111095962).

Almost surely, 2^222191923 is an apocalyptic number.

222191923 is a deficient number, since it is larger than the sum of its proper divisors (1).

222191923 is an equidigital number, since it uses as much as digits as its factorization.

222191923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 222191923 is about 14906.1035485468. The cubic root of 222191923 is about 605.6793343558.

It can be divided in two parts, 22219 and 1923, that added together give a palindrome (24142).

The spelling of 222191923 in words is "two hundred twenty-two million, one hundred ninety-one thousand, nine hundred twenty-three".