3122151220 has 12 divisors (see below), whose sum is σ = 6556517604. Its totient is φ = 1248860480.

The previous prime is 3122151209. The next prime is 3122151233. The reversal of 3122151220 is 221512213.

3122151220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 563207824 + 2558943396 = 23732^2 + 50586^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78053761 + ... + 78053800.

It is an arithmetic number, because the mean of its divisors is an integer number (546376467).

Almost surely, 2^3122151220 is an apocalyptic number.

It is an amenable number.

3122151220 is an abundant number, since it is smaller than the sum of its proper divisors (3434366384).

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

3122151220 is a wasteful number, since it uses less digits than its factorization.

3122151220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156107570 (or 156107568 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 3122151220 is about 55876.2133649015. The cubic root of 3122151220 is about 1461.5644736005.

Adding to 3122151220 its reverse (221512213), we get a palindrome (3343663433).

The spelling of 3122151220 in words is "three billion, one hundred twenty-two million, one hundred fifty-one thousand, two hundred twenty".