210222989 has 2 divisors, whose sum is σ = 210222990. Its totient is φ = 210222988.

The previous prime is 210222953. The next prime is 210223009. The reversal of 210222989 is 989222012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138532900 + 71690089 = 11770^2 + 8467^2 .

It is a cyclic number.

It is not a de Polignac number, because 210222989 - 2¹² = 210218893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210222589) 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, 105111494 + 105111495.

It is an arithmetic number, because the mean of its divisors is an integer number (105111495).

Almost surely, 2^210222989 is an apocalyptic number.

It is an amenable number.

210222989 is a deficient number, since it is larger than the sum of its proper divisors (1).

210222989 is an equidigital number, since it uses as much as digits as its factorization.

210222989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 210222989 is about 14499.0685562901. The cubic root of 210222989 is about 594.6025064433.

The spelling of 210222989 in words is "two hundred ten million, two hundred twenty-two thousand, nine hundred eighty-nine".