222178349 has 2 divisors, whose sum is σ = 222178350. Its totient is φ = 222178348.

The previous prime is 222178261. The next prime is 222178361. The reversal of 222178349 is 943871222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179694025 + 42484324 = 13405^2 + 6518^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222178349 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222178399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111089174 + 111089175.

It is an arithmetic number, because the mean of its divisors is an integer number (111089175).

Almost surely, 2^222178349 is an apocalyptic number.

It is an amenable number.

222178349 is a deficient number, since it is larger than the sum of its proper divisors (1).

222178349 is an equidigital number, since it uses as much as digits as its factorization.

222178349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 222178349 is about 14905.6482247502. The cubic root of 222178349 is about 605.6670001860.

The spelling of 222178349 in words is "two hundred twenty-two million, one hundred seventy-eight thousand, three hundred forty-nine".