5522221 has 4 divisors (see below), whose sum is σ = 5558944. Its totient is φ = 5485500.

The previous prime is 5522219. The next prime is 5522233. The reversal of 5522221 is 1222255.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1222255 = 5 ⋅244451.

It is a cyclic number.

It is not a de Polignac number, because 5522221 - 2¹ = 5522219 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5522261) 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, 18135 + ... + 18436.

It is an arithmetic number, because the mean of its divisors is an integer number (1389736).

Almost surely, 2^5522221 is an apocalyptic number.

It is an amenable number.

5522221 is a deficient number, since it is larger than the sum of its proper divisors (36723).

5522221 is a wasteful number, since it uses less digits than its factorization.

5522221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36722.

The product of its digits is 400, while the sum is 19.

The square root of 5522221 is about 2349.9406375481. The cubic root of 5522221 is about 176.7548181571.

Adding to 5522221 its reverse (1222255), we get a palindrome (6744476).

The spelling of 5522221 in words is "five million, five hundred twenty-two thousand, two hundred twenty-one".