6181831220 has 18 divisors (see below), whose sum is σ = 12982584006. Its totient is φ = 2472591840.

The previous prime is 6181831213. The next prime is 6181831247. The reversal of 6181831220 is 221381816.

It can be written as a sum of positive squares in 3 ways, for example, as 26173456 + 6155657764 = 5116^2 + 78458^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 342830 + ... + 360410.

It is an arithmetic number, because the mean of its divisors is an integer number (721254667).

Almost surely, 2^6181831220 is an apocalyptic number.

It is an amenable number.

6181831220 is an abundant number, since it is smaller than the sum of its proper divisors (6800752786).

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

6181831220 is an frugal number, since it uses more digits than its factorization.

6181831220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35171 (or 17588 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 6181831220 is about 78624.6222248476. The cubic root of 6181831220 is about 1835.2942945789.

The spelling of 6181831220 in words is "six billion, one hundred eighty-one million, eight hundred thirty-one thousand, two hundred twenty".