231217589 has 2 divisors, whose sum is σ = 231217590. Its totient is φ = 231217588.

The previous prime is 231217559. The next prime is 231217601. The reversal of 231217589 is 985712132.

231217589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118156900 + 113060689 = 10870^2 + 10633^2 .

It is a cyclic number.

It is not a de Polignac number, because 231217589 - 2²⁰ = 230169013 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 (231217529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115608794 + 115608795.

It is an arithmetic number, because the mean of its divisors is an integer number (115608795).

Almost surely, 2^231217589 is an apocalyptic number.

It is an amenable number.

231217589 is a deficient number, since it is larger than the sum of its proper divisors (1).

231217589 is an equidigital number, since it uses as much as digits as its factorization.

231217589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 231217589 is about 15205.8406212876. The cubic root of 231217589 is about 613.7718358811.

The spelling of 231217589 in words is "two hundred thirty-one million, two hundred seventeen thousand, five hundred eighty-nine".