5500021 has 2 divisors, whose sum is σ = 5500022. Its totient is φ = 5500020.

The previous prime is 5500009. The next prime is 5500067. The reversal of 5500021 is 1200055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4796100 + 703921 = 2190^2 + 839^2 .

It is a cyclic number.

It is not a de Polignac number, because 5500021 - 2⁹ = 5499509 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 5499974 and 5500010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5500321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2750010 + 2750011.

It is an arithmetic number, because the mean of its divisors is an integer number (2750011).

Almost surely, 2^5500021 is an apocalyptic number.

It is an amenable number.

5500021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5500021 is an equidigital number, since it uses as much as digits as its factorization.

5500021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 5500021 is about 2345.2123571225. The cubic root of 5500021 is about 176.5176414245.

Adding to 5500021 its reverse (1200055), we get a palindrome (6700076).

The spelling of 5500021 in words is "five million, five hundred thousand, twenty-one".