3120531220 has 48 divisors (see below), whose sum is σ = 6973963920. Its totient is φ = 1168799744.

The previous prime is 3120531151. The next prime is 3120531221. The reversal of 3120531220 is 221350213.

It can be written as a sum of positive squares in 8 ways, for example, as 50041476 + 3070489744 = 7074^2 + 55412^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3120531221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43686 + ... + 90274.

It is an arithmetic number, because the mean of its divisors is an integer number (145290915).

Almost surely, 2^3120531220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3120531220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3486981960).

3120531220 is an abundant number, since it is smaller than the sum of its proper divisors (3853432700).

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

3120531220 is a wasteful number, since it uses less digits than its factorization.

3120531220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46812 (or 46810 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 3120531220 is about 55861.7151544777. The cubic root of 3120531220 is about 1461.3116410805.

Adding to 3120531220 its reverse (221350213), we get a palindrome (3341881433).

The spelling of 3120531220 in words is "three billion, one hundred twenty million, five hundred thirty-one thousand, two hundred twenty".