90231 has 8 divisors (see below), whose sum is σ = 126720. Its totient is φ = 56952.

The previous prime is 90227. The next prime is 90239. The reversal of 90231 is 13209.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90231 - 2² = 90227 is a prime.

It is a super-2 number, since 2×90231² = 16283266722, which contains 22 as substring.

90231 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 90231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 735 + ... + 848.

It is an arithmetic number, because the mean of its divisors is an integer number (15840).

2⁹⁰²³¹ is an apocalyptic number.

90231 is a deficient number, since it is larger than the sum of its proper divisors (36489).

90231 is a wasteful number, since it uses less digits than its factorization.

90231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 90231 is about 300.3847532749. The cubic root of 90231 is about 44.8523556168.

The spelling of 90231 in words is "ninety thousand, two hundred thirty-one".