2291918449 has 4 divisors (see below), whose sum is σ = 2292235120. Its totient is φ = 2291601780.

The previous prime is 2291918437. The next prime is 2291918471. The reversal of 2291918449 is 9448191922.

2291918449 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 Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2291918449 - 2²¹ = 2289821297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2291918429) 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, 147219 + ... + 162040.

It is an arithmetic number, because the mean of its divisors is an integer number (573058780).

Almost surely, 2^2291918449 is an apocalyptic number.

It is an amenable number.

2291918449 is a deficient number, since it is larger than the sum of its proper divisors (316671).

2291918449 is an equidigital number, since it uses as much as digits as its factorization.

2291918449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316670.

The product of its digits is 373248, while the sum is 49.

The square root of 2291918449 is about 47873.9850962921. The cubic root of 2291918449 is about 1318.4582644530.

The spelling of 2291918449 in words is "two billion, two hundred ninety-one million, nine hundred eighteen thousand, four hundred forty-nine".