5131321 has 4 divisors (see below), whose sum is σ = 5526052. Its totient is φ = 4736592.

The previous prime is 5131307. The next prime is 5131333. The reversal of 5131321 is 1231315.

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 883600 + 4247721 = 940^2 + 2061^2 .

It is a cyclic number.

It is not a de Polignac number, because 5131321 - 2⁹ = 5130809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5131295 and 5131304.

It is not an unprimeable number, because it can be changed into a prime (5131351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197346 + ... + 197371.

It is an arithmetic number, because the mean of its divisors is an integer number (1381513).

Almost surely, 2^5131321 is an apocalyptic number.

It is an amenable number.

5131321 is a deficient number, since it is larger than the sum of its proper divisors (394731).

5131321 is a wasteful number, since it uses less digits than its factorization.

5131321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394730.

The product of its digits is 90, while the sum is 16.

The square root of 5131321 is about 2265.2419296843. The cubic root of 5131321 is about 172.4817147880.

Adding to 5131321 its reverse (1231315), we get a palindrome (6362636).

The spelling of 5131321 in words is "five million, one hundred thirty-one thousand, three hundred twenty-one".