22233001991 has 2 divisors, whose sum is σ = 22233001992. Its totient is φ = 22233001990.

The previous prime is 22233001969. The next prime is 22233002021. The reversal of 22233001991 is 19910033222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22233001991 - 2¹⁸ = 22232739847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22233001391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11116500995 + 11116500996.

It is an arithmetic number, because the mean of its divisors is an integer number (11116500996).

Almost surely, 2^22233001991 is an apocalyptic number.

22233001991 is a deficient number, since it is larger than the sum of its proper divisors (1).

22233001991 is an equidigital number, since it uses as much as digits as its factorization.

22233001991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The spelling of 22233001991 in words is "twenty-two billion, two hundred thirty-three million, one thousand, nine hundred ninety-one".