5213521 has 4 divisors (see below), whose sum is σ = 5234544. Its totient is φ = 5192500.

The previous prime is 5213501. The next prime is 5213539. The reversal of 5213521 is 1253125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5213521 - 2¹¹ = 5211473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5213501) 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, 10135 + ... + 10636.

It is an arithmetic number, because the mean of its divisors is an integer number (1308636).

Almost surely, 2^5213521 is an apocalyptic number.

It is an amenable number.

5213521 is a deficient number, since it is larger than the sum of its proper divisors (21023).

5213521 is a wasteful number, since it uses less digits than its factorization.

5213521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21022.

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

The square root of 5213521 is about 2283.3136008880. The cubic root of 5213521 is about 173.3978503255.

Adding to 5213521 its reverse (1253125), we get a palindrome (6466646).

The spelling of 5213521 in words is "five million, two hundred thirteen thousand, five hundred twenty-one".