231252399 has 12 divisors (see below), whose sum is σ = 381750096. Its totient is φ = 132144192.

The previous prime is 231252397. The next prime is 231252421. The reversal of 231252399 is 993252132.

It is not a de Polignac number, because 231252399 - 2¹ = 231252397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231252397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1835274 + ... + 1835399.

It is an arithmetic number, because the mean of its divisors is an integer number (31812508).

Almost surely, 2^231252399 is an apocalyptic number.

231252399 is a deficient number, since it is larger than the sum of its proper divisors (150497697).

231252399 is a wasteful number, since it uses less digits than its factorization.

231252399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3670686 (or 3670683 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 231252399 is about 15206.9852041751. The cubic root of 231252399 is about 613.8026356220.

The spelling of 231252399 in words is "two hundred thirty-one million, two hundred fifty-two thousand, three hundred ninety-nine".