9113131220 has 24 divisors (see below), whose sum is σ = 19140010344. Its totient is φ = 3644788736.

The previous prime is 9113131201. The next prime is 9113131243. The reversal of 9113131220 is 221313119.

It can be written as a sum of positive squares in 4 ways, for example, as 211586116 + 8901545104 = 14546^2 + 94348^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163244 + ... + 211836.

It is an arithmetic number, because the mean of its divisors is an integer number (797500431).

Almost surely, 2^9113131220 is an apocalyptic number.

It is an amenable number.

9113131220 is an abundant number, since it is smaller than the sum of its proper divisors (10026879124).

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

9113131220 is a wasteful number, since it uses less digits than its factorization.

9113131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57979 (or 57977 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 9113131220 is about 95462.7216247264. The cubic root of 9113131220 is about 2088.7632022213.

Adding to 9113131220 its reverse (221313119), we get a palindrome (9334444339).

The spelling of 9113131220 in words is "nine billion, one hundred thirteen million, one hundred thirty-one thousand, two hundred twenty".