99231 has 16 divisors (see below), whose sum is σ = 150528. Its totient is φ = 57600.

The previous prime is 99223. The next prime is 99233. The reversal of 99231 is 13299.

It is a happy number.

It is not a de Polignac number, because 99231 - 2³ = 99223 is a prime.

It is a super-2 number, since 2×99231² = 19693582722, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 99231.

It is not an unprimeable number, because it can be changed into a prime (99233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 975 + ... + 1071.

It is an arithmetic number, because the mean of its divisors is an integer number (9408).

2⁹⁹²³¹ is an apocalyptic number.

99231 is a deficient number, since it is larger than the sum of its proper divisors (51297).

99231 is a wasteful number, since it uses less digits than its factorization.

99231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142.

The product of its digits is 486, while the sum is 24.

The square root of 99231 is about 315.0095236656. The cubic root of 99231 is about 46.2966026488.

The spelling of 99231 in words is "ninety-nine thousand, two hundred thirty-one".