222549989 has 2 divisors, whose sum is σ = 222549990. Its totient is φ = 222549988.

The previous prime is 222549923. The next prime is 222550019. The reversal of 222549989 is 989945222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220284964 + 2265025 = 14842^2 + 1505^2 .

It is a cyclic number.

It is not a de Polignac number, because 222549989 - 2¹⁶ = 222484453 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222549919) 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, 111274994 + 111274995.

It is an arithmetic number, because the mean of its divisors is an integer number (111274995).

Almost surely, 2^222549989 is an apocalyptic number.

It is an amenable number.

222549989 is a deficient number, since it is larger than the sum of its proper divisors (1).

222549989 is an equidigital number, since it uses as much as digits as its factorization.

222549989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 50.

The square root of 222549989 is about 14918.1094311578. The cubic root of 222549989 is about 606.0045138666.

The spelling of 222549989 in words is "two hundred twenty-two million, five hundred forty-nine thousand, nine hundred eighty-nine".