2291147144 has 64 divisors (see below), whose sum is σ = 5056309440. Its totient is φ = 959535360.

The previous prime is 2291147119. The next prime is 2291147153. The reversal of 2291147144 is 4417411922.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 745499 + ... + 748565.

It is an arithmetic number, because the mean of its divisors is an integer number (79004835).

Almost surely, 2^2291147144 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 2291147144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2528154720).

2291147144 is an abundant number, since it is smaller than the sum of its proper divisors (2765162296).

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

2291147144 is a wasteful number, since it uses less digits than its factorization.

2291147144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3750 (or 3746 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 2291147144 is about 47865.9288429672. The cubic root of 2291147144 is about 1318.3103465154.

The spelling of 2291147144 in words is "two billion, two hundred ninety-one million, one hundred forty-seven thousand, one hundred forty-four".