5231321 has 4 divisors (see below), whose sum is σ = 5236644. Its totient is φ = 5226000.

The previous prime is 5231311. The next prime is 5231329. The reversal of 5231321 is 1231325.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 105625 + 5125696 = 325^2 + 2264^2 .

It is a cyclic number.

It is not a de Polignac number, because 5231321 - 2¹⁰ = 5230297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5231321.

It is not an unprimeable number, because it can be changed into a prime (5231329) 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, 710 + ... + 3311.

It is an arithmetic number, because the mean of its divisors is an integer number (1309161).

Almost surely, 2^5231321 is an apocalyptic number.

It is an amenable number.

5231321 is a deficient number, since it is larger than the sum of its proper divisors (5323).

5231321 is a wasteful number, since it uses less digits than its factorization.

5231321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5322.

The product of its digits is 180, while the sum is 17.

The square root of 5231321 is about 2287.2081234553. The cubic root of 5231321 is about 173.5949644423.

Adding to 5231321 its reverse (1231325), we get a palindrome (6462646).

The spelling of 5231321 in words is "five million, two hundred thirty-one thousand, three hundred twenty-one".