5231521 has 2 divisors, whose sum is σ = 5231522. Its totient is φ = 5231520.

The previous prime is 5231503. The next prime is 5231531. The reversal of 5231521 is 1251325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3381921 + 1849600 = 1839^2 + 1360^2 .

It is a cyclic number.

It is not a de Polignac number, because 5231521 - 2¹⁹ = 4707233 is a prime.

5231521 is a lucky number.

It is a plaindrome in base 13.

It is a zygodrome in base 13.

It is not a weakly prime, because it can be changed into another prime (5231531) 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 as a sum of consecutive naturals, namely, 2615760 + 2615761.

It is an arithmetic number, because the mean of its divisors is an integer number (2615761).

Almost surely, 2^5231521 is an apocalyptic number.

It is an amenable number.

5231521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5231521 is an equidigital number, since it uses as much as digits as its factorization.

5231521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 300, while the sum is 19.

The square root of 5231521 is about 2287.2518444631. The cubic root of 5231521 is about 173.5971766656.

Adding to 5231521 its reverse (1251325), we get a palindrome (6482846).

The spelling of 5231521 in words is "five million, two hundred thirty-one thousand, five hundred twenty-one".