232531289 has 2 divisors, whose sum is σ = 232531290. Its totient is φ = 232531288.

The previous prime is 232531261. The next prime is 232531297. The reversal of 232531289 is 982135232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147744025 + 84787264 = 12155^2 + 9208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232531289 is a prime.

It is not a weakly prime, because it can be changed into another prime (232531249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116265644 + 116265645.

It is an arithmetic number, because the mean of its divisors is an integer number (116265645).

Almost surely, 2^232531289 is an apocalyptic number.

It is an amenable number.

232531289 is a deficient number, since it is larger than the sum of its proper divisors (1).

232531289 is an equidigital number, since it uses as much as digits as its factorization.

232531289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 232531289 is about 15248.9766541890. The cubic root of 232531289 is about 614.9320558601.

It can be divided in two parts, 23253 and 1289, that added together give a palindrome (24542).

The spelling of 232531289 in words is "two hundred thirty-two million, five hundred thirty-one thousand, two hundred eighty-nine".