231860 has 12 divisors (see below), whose sum is σ = 486948. Its totient is φ = 92736.

The previous prime is 231859. The next prime is 231871. The reversal of 231860 is 68132.

231860 = T₂₇₅ + T₂₇₆ + ... + T₂₈₀.

231860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 163216 + 68644 = 404^2 + 262^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 11593 = 231860 / (2 + 3 + 1 + 8 + 6 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5777 + ... + 5816.

It is an arithmetic number, because the mean of its divisors is an integer number (40579).

2²³¹⁸⁶⁰ is an apocalyptic number.

231860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231860 is an abundant number, since it is smaller than the sum of its proper divisors (255088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231860 is a wasteful number, since it uses less digits than its factorization.

231860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11602 (or 11600 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 231860 is about 481.5184316306. The cubic root of 231860 is about 61.4339741314.

Adding to 231860 its reverse (68132), we get a palindrome (299992).

The spelling of 231860 in words is "two hundred thirty-one thousand, eight hundred sixty".