5580821 has 4 divisors (see below), whose sum is σ = 5731692. Its totient is φ = 5429952.

The previous prime is 5580791. The next prime is 5580833. The reversal of 5580821 is 1280855.

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 5340721 + 240100 = 2311^2 + 490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5580821 is a prime.

It is a super-2 number, since 2×5580821² = 62291126068082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5580871) 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, 75380 + ... + 75453.

It is an arithmetic number, because the mean of its divisors is an integer number (1432923).

Almost surely, 2^5580821 is an apocalyptic number.

It is an amenable number.

5580821 is a deficient number, since it is larger than the sum of its proper divisors (150871).

5580821 is a wasteful number, since it uses less digits than its factorization.

5580821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150870.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 5580821 is about 2362.3761343190. The cubic root of 5580821 is about 177.3778409619.

The spelling of 5580821 in words is "five million, five hundred eighty thousand, eight hundred twenty-one".