231071 has 4 divisors (see below), whose sum is σ = 232200. Its totient is φ = 229944.

The previous prime is 231067. The next prime is 231079. The reversal of 231071 is 170132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 231071 - 2² = 231067 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231079) 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 3 ways as a sum of consecutive naturals, for example, 161 + ... + 698.

It is an arithmetic number, because the mean of its divisors is an integer number (58050).

2²³¹⁰⁷¹ is an apocalyptic number.

231071 is a deficient number, since it is larger than the sum of its proper divisors (1129).

231071 is an equidigital number, since it uses as much as digits as its factorization.

231071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 231071 is about 480.6984501743. The cubic root of 231071 is about 61.3642100624.

The spelling of 231071 in words is "two hundred thirty-one thousand, seventy-one".