247231 has 4 divisors (see below), whose sum is σ = 261792. Its totient is φ = 232672.

The previous prime is 247229. The next prime is 247241. The reversal of 247231 is 132742.

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 247231 - 2¹ = 247229 is a prime.

It is a super-2 number, since 2×247231² = 122246334722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 247199 and 247208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7255 + ... + 7288.

It is an arithmetic number, because the mean of its divisors is an integer number (65448).

2²⁴⁷²³¹ is an apocalyptic number.

247231 is a deficient number, since it is larger than the sum of its proper divisors (14561).

247231 is a wasteful number, since it uses less digits than its factorization.

247231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14560.

The product of its digits is 336, while the sum is 19.

The square root of 247231 is about 497.2232898809. The cubic root of 247231 is about 62.7626070552.

Adding to 247231 its reverse (132742), we get a palindrome (379973).

The spelling of 247231 in words is "two hundred forty-seven thousand, two hundred thirty-one".