222190823 has 2 divisors, whose sum is σ = 222190824. Its totient is φ = 222190822.

The previous prime is 222190817. The next prime is 222190831. The reversal of 222190823 is 328091222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222190823 - 2⁸ = 222190567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222190223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111095411 + 111095412.

It is an arithmetic number, because the mean of its divisors is an integer number (111095412).

Almost surely, 2^222190823 is an apocalyptic number.

222190823 is a deficient number, since it is larger than the sum of its proper divisors (1).

222190823 is an equidigital number, since it uses as much as digits as its factorization.

222190823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 222190823 is about 14906.0666508640. The cubic root of 222190823 is about 605.6783348470.

The spelling of 222190823 in words is "two hundred twenty-two million, one hundred ninety thousand, eight hundred twenty-three".