5231813 has 4 divisors (see below), whose sum is σ = 5246988. Its totient is φ = 5216640.

The previous prime is 5231797. The next prime is 5231827. The reversal of 5231813 is 3181325.

5231813 is digitally balanced in base 3, 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 can be written as a sum of positive squares in 2 ways, for example, as 2211169 + 3020644 = 1487^2 + 1738^2 .

It is a cyclic number.

It is not a de Polignac number, because 5231813 - 2⁴ = 5231797 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5231843) 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, 7058 + ... + 7763.

It is an arithmetic number, because the mean of its divisors is an integer number (1311747).

Almost surely, 2^5231813 is an apocalyptic number.

It is an amenable number.

5231813 is a deficient number, since it is larger than the sum of its proper divisors (15175).

5231813 is a wasteful number, since it uses less digits than its factorization.

5231813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15174.

The product of its digits is 720, while the sum is 23.

The square root of 5231813 is about 2287.3156756338. The cubic root of 5231813 is about 173.6004064103.

The spelling of 5231813 in words is "five million, two hundred thirty-one thousand, eight hundred thirteen".