222788491 has 2 divisors, whose sum is σ = 222788492. Its totient is φ = 222788490.

The previous prime is 222788473. The next prime is 222788539. The reversal of 222788491 is 194887222.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222788491 is a prime.

It is not a weakly prime, because it can be changed into another prime (222788431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111394245 + 111394246.

It is an arithmetic number, because the mean of its divisors is an integer number (111394246).

Almost surely, 2^222788491 is an apocalyptic number.

222788491 is a deficient number, since it is larger than the sum of its proper divisors (1).

222788491 is an equidigital number, since it uses as much as digits as its factorization.

222788491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 43.

The square root of 222788491 is about 14926.1009979164. The cubic root of 222788491 is about 606.2209172147.

The spelling of 222788491 in words is "two hundred twenty-two million, seven hundred eighty-eight thousand, four hundred ninety-one".