22801987291 has 2 divisors, whose sum is σ = 22801987292. Its totient is φ = 22801987290.

The previous prime is 22801987277. The next prime is 22801987309. The reversal of 22801987291 is 19278910822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22801987291 - 2⁵ = 22801987259 is a prime.

It is not a weakly prime, because it can be changed into another prime (22801987991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11400993645 + 11400993646.

It is an arithmetic number, because the mean of its divisors is an integer number (11400993646).

Almost surely, 2^22801987291 is an apocalyptic number.

22801987291 is a deficient number, since it is larger than the sum of its proper divisors (1).

22801987291 is an equidigital number, since it uses as much as digits as its factorization.

22801987291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 49.

The spelling of 22801987291 in words is "twenty-two billion, eight hundred one million, nine hundred eighty-seven thousand, two hundred ninety-one".