2261345191 has 4 divisors (see below), whose sum is σ = 2584394512. Its totient is φ = 1938295872.

The previous prime is 2261345183. The next prime is 2261345221. The reversal of 2261345191 is 1915431622.

2261345191 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.

It is a cyclic number.

It is not a de Polignac number, because 2261345191 - 2³ = 2261345183 is a prime.

It is a super-2 number, since 2×2261345191² = 10227364145717652962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261345111) 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, 161524650 + ... + 161524663.

It is an arithmetic number, because the mean of its divisors is an integer number (646098628).

Almost surely, 2^2261345191 is an apocalyptic number.

2261345191 is a deficient number, since it is larger than the sum of its proper divisors (323049321).

2261345191 is an equidigital number, since it uses as much as digits as its factorization.

2261345191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323049320.

The product of its digits is 12960, while the sum is 34.

The square root of 2261345191 is about 47553.6033440159. The cubic root of 2261345191 is about 1312.5694361572.

The spelling of 2261345191 in words is "two billion, two hundred sixty-one million, three hundred forty-five thousand, one hundred ninety-one".