231671 has 4 divisors (see below), whose sum is σ = 252744. Its totient is φ = 210600.

The previous prime is 231661. The next prime is 231677. The reversal of 231671 is 176132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231671 - 2⁶ = 231607 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231677) 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, 10520 + ... + 10541.

It is an arithmetic number, because the mean of its divisors is an integer number (63186).

2²³¹⁶⁷¹ is an apocalyptic number.

231671 is a deficient number, since it is larger than the sum of its proper divisors (21073).

231671 is a wasteful number, since it uses less digits than its factorization.

231671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21072.

The product of its digits is 252, while the sum is 20.

The square root of 231671 is about 481.3221374506. The cubic root of 231671 is about 61.4172770190.

The spelling of 231671 in words is "two hundred thirty-one thousand, six hundred seventy-one".