3231312220 has 12 divisors (see below), whose sum is σ = 6785755704. Its totient is φ = 1292524880.

The previous prime is 3231312151. The next prime is 3231312221. The reversal of 3231312220 is 222131323.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3231312221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80782786 + ... + 80782825.

It is an arithmetic number, because the mean of its divisors is an integer number (565479642).

Almost surely, 2^3231312220 is an apocalyptic number.

It is an amenable number.

3231312220 is an abundant number, since it is smaller than the sum of its proper divisors (3554443484).

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

3231312220 is a wasteful number, since it uses less digits than its factorization.

3231312220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161565620 (or 161565618 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 3231312220 is about 56844.6322883700. The cubic root of 3231312220 is about 1478.4034737904.

Adding to 3231312220 its reverse (222131323), we get a palindrome (3453443543).

The spelling of 3231312220 in words is "three billion, two hundred thirty-one million, three hundred twelve thousand, two hundred twenty".