204831 has 12 divisors (see below), whose sum is σ = 322920. Its totient is φ = 124080.

The previous prime is 204821. The next prime is 204857. The reversal of 204831 is 138402.

It is a happy number.

It is not a de Polignac number, because 204831 - 2⁹ = 204319 is a prime.

It is a super-2 number, since 2×204831² = 83911477122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204821) 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, 936 + ... + 1133.

It is an arithmetic number, because the mean of its divisors is an integer number (26910).

2²⁰⁴⁸³¹ is an apocalyptic number.

204831 is a deficient number, since it is larger than the sum of its proper divisors (118089).

204831 is a wasteful number, since it uses less digits than its factorization.

204831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086 (or 2083 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 204831 is about 452.5825891481. The cubic root of 204831 is about 58.9474779161.

It can be divided in two parts, 204 and 831, that added together give a triangular number (1035 = T₄₅).

The spelling of 204831 in words is "two hundred four thousand, eight hundred thirty-one".