3220231220 has 24 divisors (see below), whose sum is σ = 6832206024. Its totient is φ = 1274812416.

The previous prime is 3220231213. The next prime is 3220231229. The reversal of 3220231220 is 221320223.

It can be written as a sum of positive squares in 4 ways, for example, as 363970084 + 2856261136 = 19078^2 + 53444^2 .

It is a super-2 number, since 2×3220231220² = 20739778220525376800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220231229) 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, 828017 + ... + 831896.

It is an arithmetic number, because the mean of its divisors is an integer number (284675251).

Almost surely, 2^3220231220 is an apocalyptic number.

It is an amenable number.

3220231220 is an abundant number, since it is smaller than the sum of its proper divisors (3611974804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3220231220 is a wasteful number, since it uses less digits than its factorization.

3220231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660019 (or 1660017 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 3220231220 is about 56747.0811584173. The cubic root of 3220231220 is about 1476.7115965406.

Adding to 3220231220 its reverse (221320223), we get a palindrome (3441551443).

The spelling of 3220231220 in words is "three billion, two hundred twenty million, two hundred thirty-one thousand, two hundred twenty".