231775 has 12 divisors (see below), whose sum is σ = 293632. Its totient is φ = 181440.

The previous prime is 231719. The next prime is 231779. The reversal of 231775 is 577132.

It is not a de Polignac number, because 231775 - 2¹¹ = 229727 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

Its product of digits (1470) is a multiple of the sum of its prime factors (210).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1762 + ... + 1888.

2²³¹⁷⁷⁵ is an apocalyptic number.

231775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

231775 is a deficient number, since it is larger than the sum of its proper divisors (61857).

231775 is a wasteful number, since it uses less digits than its factorization.

231775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 205 counting only the distinct ones).

The product of its digits is 1470, while the sum is 25.

The square root of 231775 is about 481.4301610826. The cubic root of 231775 is about 61.4264659713.

The spelling of 231775 in words is "two hundred thirty-one thousand, seven hundred seventy-five".