22200001957891 has 2 divisors, whose sum is σ = 22200001957892. Its totient is φ = 22200001957890.

The previous prime is 22200001957879. The next prime is 22200001957933. The reversal of 22200001957891 is 19875910000222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22200001957891 - 2⁹ = 22200001957379 is a prime.

It is not a weakly prime, because it can be changed into another prime (22200001957391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11100000978945 + 11100000978946.

It is an arithmetic number, because the mean of its divisors is an integer number (11100000978946).

Almost surely, 2^{22200001957891} is an apocalyptic number.

22200001957891 is a deficient number, since it is larger than the sum of its proper divisors (1).

22200001957891 is an equidigital number, since it uses as much as digits as its factorization.

22200001957891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 46.

The spelling of 22200001957891 in words is "twenty-two trillion, two hundred billion, one million, nine hundred fifty-seven thousand, eight hundred ninety-one".