2238856591 has 2 divisors, whose sum is σ = 2238856592. Its totient is φ = 2238856590.

The previous prime is 2238856589. The next prime is 2238856601. The reversal of 2238856591 is 1956588322.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2238856591 - 2¹ = 2238856589 is a prime.

Together with 2238856589, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2238856391) 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, 1119428295 + 1119428296.

It is an arithmetic number, because the mean of its divisors is an integer number (1119428296).

Almost surely, 2^2238856591 is an apocalyptic number.

2238856591 is a deficient number, since it is larger than the sum of its proper divisors (1).

2238856591 is an equidigital number, since it uses as much as digits as its factorization.

2238856591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1036800, while the sum is 49.

The square root of 2238856591 is about 47316.5572606461. The cubic root of 2238856591 is about 1308.2038572166.

The spelling of 2238856591 in words is "two billion, two hundred thirty-eight million, eight hundred fifty-six thousand, five hundred ninety-one".