231279 has 4 divisors (see below), whose sum is σ = 308376. Its totient is φ = 154184.

The previous prime is 231277. The next prime is 231289. The reversal of 231279 is 972132.

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 231279 - 2¹ = 231277 is a prime.

It is a D-number.

231279 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38544 + ... + 38549.

It is an arithmetic number, because the mean of its divisors is an integer number (77094).

2²³¹²⁷⁹ is an apocalyptic number.

231279 is a deficient number, since it is larger than the sum of its proper divisors (77097).

231279 is an equidigital number, since it uses as much as digits as its factorization.

231279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77096.

The product of its digits is 756, while the sum is 24.

The square root of 231279 is about 480.9147533607. The cubic root of 231279 is about 61.3826169991.

The spelling of 231279 in words is "two hundred thirty-one thousand, two hundred seventy-nine".