5517221 has 4 divisors (see below), whose sum is σ = 5707500. Its totient is φ = 5326944.

The previous prime is 5517209. The next prime is 5517227. The reversal of 5517221 is 1227155.

It is a happy number.

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 4456321 + 1060900 = 2111^2 + 1030^2 .

It is a cyclic number.

It is not a de Polignac number, because 5517221 - 2¹⁴ = 5500837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5517227) 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, 95096 + ... + 95153.

It is an arithmetic number, because the mean of its divisors is an integer number (1426875).

Almost surely, 2^5517221 is an apocalyptic number.

It is an amenable number.

5517221 is a deficient number, since it is larger than the sum of its proper divisors (190279).

5517221 is a wasteful number, since it uses less digits than its factorization.

5517221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190278.

The product of its digits is 700, while the sum is 23.

The square root of 5517221 is about 2348.8765399654. The cubic root of 5517221 is about 176.7014555120.

The spelling of 5517221 in words is "five million, five hundred seventeen thousand, two hundred twenty-one".