231039 has 16 divisors (see below), whose sum is σ = 352000. Its totient is φ = 149688.

The previous prime is 231031. The next prime is 231041. The reversal of 231039 is 930132.

231039 = 3² + 4² + ... + 88².

It is not a de Polignac number, because 231039 - 2³ = 231031 is a prime.

It is a super-3 number, since 3×231039³ = 36997905873336957, which contains 333 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231031) 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, 1062 + ... + 1260.

It is an arithmetic number, because the mean of its divisors is an integer number (22000).

2²³¹⁰³⁹ is an apocalyptic number.

231039 is a deficient number, since it is larger than the sum of its proper divisors (120961).

231039 is a wasteful number, since it uses less digits than its factorization.

231039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 231039 is about 480.6651641216. The cubic root of 231039 is about 61.3613772457.

The spelling of 231039 in words is "two hundred thirty-one thousand, thirty-nine".