2291930591 has 4 divisors (see below), whose sum is σ = 2292052152. Its totient is φ = 2291809032.

The previous prime is 2291930549. The next prime is 2291930593. The reversal of 2291930591 is 1950391922.

2291930591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2291930591 - 2²⁶ = 2224821727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291930593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25781 + ... + 72446.

It is an arithmetic number, because the mean of its divisors is an integer number (573013038).

Almost surely, 2^2291930591 is an apocalyptic number.

2291930591 is a deficient number, since it is larger than the sum of its proper divisors (121561).

2291930591 is an equidigital number, since it uses as much as digits as its factorization.

2291930591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121560.

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 2291930591 is about 47874.1119082119. Note that the first 3 decimals coincide. The cubic root of 2291930591 is about 1318.4605927342.

The spelling of 2291930591 in words is "two billion, two hundred ninety-one million, nine hundred thirty thousand, five hundred ninety-one".