231047 has 4 divisors (see below), whose sum is σ = 244656. Its totient is φ = 217440.

The previous prime is 231041. The next prime is 231053. The reversal of 231047 is 740132.

It is a happy number.

231047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (231041) and next prime (231053).

It is a cyclic number.

It is not a de Polignac number, because 231047 - 2⁴ = 231031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 13591 = 231047 / (2 + 3 + 1 + 0 + 4 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231041) 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, 6779 + ... + 6812.

It is an arithmetic number, because the mean of its divisors is an integer number (61164).

2²³¹⁰⁴⁷ is an apocalyptic number.

231047 is a deficient number, since it is larger than the sum of its proper divisors (13609).

231047 is a wasteful number, since it uses less digits than its factorization.

231047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13608.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 231047 is about 480.6734858508. The cubic root of 231047 is about 61.3620854744.

Adding to 231047 its reverse (740132), we get a palindrome (971179).

The spelling of 231047 in words is "two hundred thirty-one thousand, forty-seven".