724565231 has 4 divisors (see below), whose sum is σ = 780301032. Its totient is φ = 668829432.

The previous prime is 724565227. The next prime is 724565239. The reversal of 724565231 is 132565427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132565427 = 47 ⋅2820541.

It is a cyclic number.

It is not a de Polignac number, because 724565231 - 2² = 724565227 is a prime.

It is a super-2 number, since 2×724565231² = 1049989547948166722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 724565191 and 724565200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724565239) 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, 27867881 + ... + 27867906.

It is an arithmetic number, because the mean of its divisors is an integer number (195075258).

Almost surely, 2^724565231 is an apocalyptic number.

724565231 is a deficient number, since it is larger than the sum of its proper divisors (55735801).

724565231 is a wasteful number, since it uses less digits than its factorization.

724565231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55735800.

The product of its digits is 50400, while the sum is 35.

The square root of 724565231 is about 26917.7493672855. The cubic root of 724565231 is about 898.1712788968.

The spelling of 724565231 in words is "seven hundred twenty-four million, five hundred sixty-five thousand, two hundred thirty-one".