3220303021 has 8 divisors (see below), whose sum is σ = 3471511064. Its totient is φ = 2969593920.

The previous prime is 3220303007. The next prime is 3220303049. The reversal of 3220303021 is 1203030223.

It can be written as a sum of positive squares in 4 ways, for example, as 152250921 + 3068052100 = 12339^2 + 55390^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3220303021 - 2¹⁵ = 3220270253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3220302986 and 3220303004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220303061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111270 + ... + 137191.

It is an arithmetic number, because the mean of its divisors is an integer number (433938883).

Almost surely, 2^3220303021 is an apocalyptic number.

It is an amenable number.

3220303021 is a deficient number, since it is larger than the sum of its proper divisors (251208043).

3220303021 is a wasteful number, since it uses less digits than its factorization.

3220303021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249471.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 3220303021 is about 56747.7137953592. The cubic root of 3220303021 is about 1476.7225717961.

Adding to 3220303021 its reverse (1203030223), we get a palindrome (4423333244).

The spelling of 3220303021 in words is "three billion, two hundred twenty million, three hundred three thousand, twenty-one".