3221661223 has 16 divisors (see below), whose sum is σ = 3789757440. Its totient is φ = 2706955200.

The previous prime is 3221661203. The next prime is 3221661227.

3221661223 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 3221661223 - 2²¹ = 3219564071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3221661191 and 3221661200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221661227) 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, 179415 + ... + 196552.

It is an arithmetic number, because the mean of its divisors is an integer number (236859840).

Almost surely, 2^3221661223 is an apocalyptic number.

3221661223 is a deficient number, since it is larger than the sum of its proper divisors (568096217).

3221661223 is a wasteful number, since it uses less digits than its factorization.

3221661223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376038.

The product of its digits is 5184, while the sum is 28.

The square root of 3221661223 is about 56759.6795533590. The cubic root of 3221661223 is about 1476.9301511894.

It can be divided in two parts, 32216 and 61223, that added together give a palindrome (93439).

The spelling of 3221661223 in words is "three billion, two hundred twenty-one million, six hundred sixty-one thousand, two hundred twenty-three".