331222189 has 2 divisors, whose sum is σ = 331222190. Its totient is φ = 331222188.

The previous prime is 331222183. The next prime is 331222267. The reversal of 331222189 is 981222133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259532100 + 71690089 = 16110^2 + 8467^2 .

It is a cyclic number.

It is not a de Polignac number, because 331222189 - 2⁷ = 331222061 is a prime.

It is a super-3 number, since 3×331222189³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 331222189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331222183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165611094 + 165611095.

It is an arithmetic number, because the mean of its divisors is an integer number (165611095).

Almost surely, 2^331222189 is an apocalyptic number.

It is an amenable number.

331222189 is a deficient number, since it is larger than the sum of its proper divisors (1).

331222189 is an equidigital number, since it uses as much as digits as its factorization.

331222189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 331222189 is about 18199.5106802353. The cubic root of 331222189 is about 691.8943874430.

The spelling of 331222189 in words is "three hundred thirty-one million, two hundred twenty-two thousand, one hundred eighty-nine".