2291281596 has 36 divisors (see below), whose sum is σ = 5797682800. Its totient is φ = 762991488.

The previous prime is 2291281591. The next prime is 2291281609. The reversal of 2291281596 is 6951821922.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291281591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4785 + ... + 67863.

Almost surely, 2^2291281596 is an apocalyptic number.

It is an amenable number.

2291281596 is an abundant number, since it is smaller than the sum of its proper divisors (3506401204).

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

2291281596 is a wasteful number, since it uses less digits than its factorization.

2291281596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64098 (or 64093 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 2291281596 is about 47867.3332869087. Note that the first 3 decimals coincide. The cubic root of 2291281596 is about 1318.3361335971.

The spelling of 2291281596 in words is "two billion, two hundred ninety-one million, two hundred eighty-one thousand, five hundred ninety-six".