724313231 has 4 divisors (see below), whose sum is σ = 762435000. Its totient is φ = 686191464.

The previous prime is 724313179. The next prime is 724313267. The reversal of 724313231 is 132313427.

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 724313231 - 2¹⁴ = 724296847 is a prime.

It is a super-2 number, since 2×724313231² = 1049259313203318722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 724313231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724313431) 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, 19060856 + ... + 19060893.

It is an arithmetic number, because the mean of its divisors is an integer number (190608750).

Almost surely, 2^724313231 is an apocalyptic number.

724313231 is a deficient number, since it is larger than the sum of its proper divisors (38121769).

724313231 is a wasteful number, since it uses less digits than its factorization.

724313231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38121768.

The product of its digits is 3024, while the sum is 26.

The square root of 724313231 is about 26913.0680339496. The cubic root of 724313231 is about 898.0671403976.

Adding to 724313231 its reverse (132313427), we get a palindrome (856626658).

The spelling of 724313231 in words is "seven hundred twenty-four million, three hundred thirteen thousand, two hundred thirty-one".