2131345722 has 64 divisors (see below), whose sum is σ = 4775500800. Its totient is φ = 628540800.

The previous prime is 2131345721. The next prime is 2131345739. The reversal of 2131345722 is 2275431312.

It is a self number, because there is not a number n which added to its sum of digits gives 2131345722.

It is not an unprimeable number, because it can be changed into a prime (2131345721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1522779 + ... + 1524177.

It is an arithmetic number, because the mean of its divisors is an integer number (74617200).

Almost surely, 2^2131345722 is an apocalyptic number.

2131345722 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a pronic number, being equal to 46166×46167.

It is a practical number, because each smaller number is the sum of distinct divisors of 2131345722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2387750400).

2131345722 is an abundant number, since it is smaller than the sum of its proper divisors (2644155078).

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

2131345722 is a wasteful number, since it uses less digits than its factorization.

2131345722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019.

The product of its digits is 10080, while the sum is 30.

The square root of 2131345722 is about 46166.4999972924. The cubic root of 2131345722 is about 1286.9192599054.

The spelling of 2131345722 in words is "two billion, one hundred thirty-one million, three hundred forty-five thousand, seven hundred twenty-two".