231222889 has 2 divisors, whose sum is σ = 231222890. Its totient is φ = 231222888.

The previous prime is 231222863. The next prime is 231222923. The reversal of 231222889 is 988222132.

231222889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221563225 + 9659664 = 14885^2 + 3108^2 .

It is a cyclic number.

It is not a de Polignac number, because 231222889 - 2⁵ = 231222857 is a prime.

It is not a weakly prime, because it can be changed into another prime (231222839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115611444 + 115611445.

It is an arithmetic number, because the mean of its divisors is an integer number (115611445).

Almost surely, 2^231222889 is an apocalyptic number.

It is an amenable number.

231222889 is a deficient number, since it is larger than the sum of its proper divisors (1).

231222889 is an equidigital number, since it uses as much as digits as its factorization.

231222889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 37.

The square root of 231222889 is about 15206.0148954287. The cubic root of 231222889 is about 613.7765254982.

The spelling of 231222889 in words is "two hundred thirty-one million, two hundred twenty-two thousand, eight hundred eighty-nine".