231465589 has 2 divisors, whose sum is σ = 231465590. Its totient is φ = 231465588.

The previous prime is 231465587. The next prime is 231465607. The reversal of 231465589 is 985564132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130302225 + 101163364 = 11415^2 + 10058^2 .

It is a cyclic number.

It is not a de Polignac number, because 231465589 - 2¹ = 231465587 is a prime.

It is a super-2 number, since 2×231465589² = 107152637782233842, which contains 22 as substring.

Together with 231465587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231465587) 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, 115732794 + 115732795.

It is an arithmetic number, because the mean of its divisors is an integer number (115732795).

Almost surely, 2^231465589 is an apocalyptic number.

It is an amenable number.

231465589 is a deficient number, since it is larger than the sum of its proper divisors (1).

231465589 is an equidigital number, since it uses as much as digits as its factorization.

231465589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 43.

The square root of 231465589 is about 15213.9931970538. The cubic root of 231465589 is about 613.9911978352.

The spelling of 231465589 in words is "two hundred thirty-one million, four hundred sixty-five thousand, five hundred eighty-nine".