2261512291 has 2 divisors, whose sum is σ = 2261512292. Its totient is φ = 2261512290.

The previous prime is 2261512289. The next prime is 2261512361. The reversal of 2261512291 is 1922151622.

2261512291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2261512291 - 2¹ = 2261512289 is a prime.

It is a super-2 number, since 2×2261512291² = 10228875684688137362, which contains 22 as substring.

Together with 2261512289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2261512391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130756145 + 1130756146.

It is an arithmetic number, because the mean of its divisors is an integer number (1130756146).

Almost surely, 2^2261512291 is an apocalyptic number.

2261512291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261512291 is an equidigital number, since it uses as much as digits as its factorization.

2261512291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 31.

The square root of 2261512291 is about 47555.3602762086. The cubic root of 2261512291 is about 1312.6017657268.

The spelling of 2261512291 in words is "two billion, two hundred sixty-one million, five hundred twelve thousand, two hundred ninety-one".