3220144221 has 24 divisors (see below), whose sum is σ = 5013001344. Its totient is φ = 1833269760.

The previous prime is 3220144219. The next prime is 3220144231. The reversal of 3220144221 is 1224410223.

It is not a de Polignac number, because 3220144221 - 2¹ = 3220144219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220144231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 580 + ... + 80253.

It is an arithmetic number, because the mean of its divisors is an integer number (208875056).

Almost surely, 2^3220144221 is an apocalyptic number.

It is an amenable number.

3220144221 is a deficient number, since it is larger than the sum of its proper divisors (1792857123).

3220144221 is a wasteful number, since it uses less digits than its factorization.

3220144221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81121 (or 81114 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 3220144221 is about 56746.3146028004. The cubic root of 3220144221 is about 1476.6982979521.

Adding to 3220144221 its reverse (1224410223), we get a palindrome (4444554444).

The spelling of 3220144221 in words is "three billion, two hundred twenty million, one hundred forty-four thousand, two hundred twenty-one".