231278 has 8 divisors (see below), whose sum is σ = 349272. Its totient is φ = 114856.

The previous prime is 231277. The next prime is 231289. The reversal of 231278 is 872132.

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

It is a Curzon 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 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, 101 + ... + 687.

It is an arithmetic number, because the mean of its divisors is an integer number (43659).

2²³¹²⁷⁸ is an apocalyptic number.

231278 is a deficient number, since it is larger than the sum of its proper divisors (117994).

231278 is a wasteful number, since it uses less digits than its factorization.

231278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786.

The product of its digits is 672, while the sum is 23.

The square root of 231278 is about 480.9137136743. The cubic root of 231278 is about 61.3825285306.

The spelling of 231278 in words is "two hundred thirty-one thousand, two hundred seventy-eight".