231865597 has 2 divisors, whose sum is σ = 231865598. Its totient is φ = 231865596.

The previous prime is 231865583. The next prime is 231865603. The reversal of 231865597 is 795568132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176199076 + 55666521 = 13274^2 + 7461^2 .

It is a cyclic number.

It is not a de Polignac number, because 231865597 - 2¹⁵ = 231832829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231866597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115932798 + 115932799.

It is an arithmetic number, because the mean of its divisors is an integer number (115932799).

Almost surely, 2^231865597 is an apocalyptic number.

It is an amenable number.

231865597 is a deficient number, since it is larger than the sum of its proper divisors (1).

231865597 is an equidigital number, since it uses as much as digits as its factorization.

231865597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 46.

The square root of 231865597 is about 15227.1335779260. The cubic root of 231865597 is about 614.3446845729.

The spelling of 231865597 in words is "two hundred thirty-one million, eight hundred sixty-five thousand, five hundred ninety-seven".