231771 has 8 divisors (see below), whose sum is σ = 322560. Its totient is φ = 147752.

The previous prime is 231719. The next prime is 231779. The reversal of 231771 is 177132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231771 - 2⁷ = 231643 is a prime.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1611 + ... + 1748.

It is an arithmetic number, because the mean of its divisors is an integer number (40320).

2²³¹⁷⁷¹ is an apocalyptic number.

231771 is a deficient number, since it is larger than the sum of its proper divisors (90789).

231771 is a wasteful number, since it uses less digits than its factorization.

231771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3385.

The product of its digits is 294, while the sum is 21.

The square root of 231771 is about 481.4260067757. The cubic root of 231771 is about 61.4261126009.

The spelling of 231771 in words is "two hundred thirty-one thousand, seven hundred seventy-one".