5221509 has 4 divisors (see below), whose sum is σ = 6962016. Its totient is φ = 3481004.

The previous prime is 5221501. The next prime is 5221543. The reversal of 5221509 is 9051225.

5221509 is digitally balanced in base 4, 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, 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 5221509 - 2³ = 5221501 is a prime.

It is an Ulam number.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5221501) 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, 870249 + ... + 870254.

It is an arithmetic number, because the mean of its divisors is an integer number (1740504).

Almost surely, 2^5221509 is an apocalyptic number.

It is an amenable number.

5221509 is a deficient number, since it is larger than the sum of its proper divisors (1740507).

5221509 is a wasteful number, since it uses less digits than its factorization.

5221509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740506.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 5221509 is about 2285.0621435751. The cubic root of 5221509 is about 173.4863634580.

The spelling of 5221509 in words is "five million, two hundred twenty-one thousand, five hundred nine".