2259801991 has 2 divisors, whose sum is σ = 2259801992. Its totient is φ = 2259801990.

The previous prime is 2259801983. The next prime is 2259801997. The reversal of 2259801991 is 1991089522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2259801991 - 2³ = 2259801983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2259801997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1129900995 + 1129900996.

It is an arithmetic number, because the mean of its divisors is an integer number (1129900996).

Almost surely, 2^2259801991 is an apocalyptic number.

2259801991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2259801991 is an equidigital number, since it uses as much as digits as its factorization.

2259801991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 46.

The square root of 2259801991 is about 47537.3746750912. The cubic root of 2259801991 is about 1312.2707911883.

The spelling of 2259801991 in words is "two billion, two hundred fifty-nine million, eight hundred one thousand, nine hundred ninety-one".