5501521 has 4 divisors (see below), whose sum is σ = 5509044. Its totient is φ = 5494000.

The previous prime is 5501519. The next prime is 5501533. The reversal of 5501521 is 1251055.

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 1849600 + 3651921 = 1360^2 + 1911^2 .

It is a cyclic number.

It is not a de Polignac number, because 5501521 - 2¹ = 5501519 is a prime.

It is a Duffinian number.

5501521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5501501) 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, 2530 + ... + 4171.

It is an arithmetic number, because the mean of its divisors is an integer number (1377261).

Almost surely, 2^5501521 is an apocalyptic number.

It is an amenable number.

5501521 is a deficient number, since it is larger than the sum of its proper divisors (7523).

5501521 is an equidigital number, since it uses as much as digits as its factorization.

5501521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7522.

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 5501521 is about 2345.5321357850. The cubic root of 5501521 is about 176.5336869630.

Adding to 5501521 its reverse (1251055), we get a palindrome (6752576).

The spelling of 5501521 in words is "five million, five hundred one thousand, five hundred twenty-one".