3562221 has 16 divisors (see below), whose sum is σ = 5149760. Its totient is φ = 2177280.

The previous prime is 3562219. The next prime is 3562259. The reversal of 3562221 is 1222653.

It is not a de Polignac number, because 3562221 - 2¹ = 3562219 is a prime.

It is a Duffinian number.

It is a Curzon number.

3562221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3562211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9210 + ... + 9588.

It is an arithmetic number, because the mean of its divisors is an integer number (321860).

Almost surely, 2^3562221 is an apocalyptic number.

It is an amenable number.

3562221 is a deficient number, since it is larger than the sum of its proper divisors (1587539).

3562221 is a wasteful number, since it uses less digits than its factorization.

3562221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636.

The product of its digits is 720, while the sum is 21.

The square root of 3562221 is about 1887.3846984650. The cubic root of 3562221 is about 152.7238815020.

Adding to 3562221 its reverse (1222653), we get a palindrome (4784874).

The spelling of 3562221 in words is "three million, five hundred sixty-two thousand, two hundred twenty-one".