231447 has 8 divisors (see below), whose sum is σ = 311040. Its totient is φ = 153080.

The previous prime is 231443. The next prime is 231461. The reversal of 231447 is 744132.

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

It is a cyclic number.

It is not a de Polignac number, because 231447 - 2² = 231443 is a prime.

231447 is a lucky number.

It is a plaindrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 231447.

It is not an unprimeable number, because it can be changed into a prime (231443) 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, 322 + ... + 752.

It is an arithmetic number, because the mean of its divisors is an integer number (38880).

2²³¹⁴⁴⁷ is an apocalyptic number.

231447 is a deficient number, since it is larger than the sum of its proper divisors (79593).

231447 is a wasteful number, since it uses less digits than its factorization.

231447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613.

The product of its digits is 672, while the sum is 21.

The square root of 231447 is about 481.0893887834. The cubic root of 231447 is about 61.3974760852.

Adding to 231447 its reverse (744132), we get a palindrome (975579).

The spelling of 231447 in words is "two hundred thirty-one thousand, four hundred forty-seven".