22200491 has 2 divisors, whose sum is σ = 22200492. Its totient is φ = 22200490.

The previous prime is 22200469. The next prime is 22200499. The reversal of 22200491 is 19400222.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22200491 is a prime.

It is not a weakly prime, because it can be changed into another prime (22200499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11100245 + 11100246.

It is an arithmetic number, because the mean of its divisors is an integer number (11100246).

Almost surely, 2^22200491 is an apocalyptic number.

22200491 is a deficient number, since it is larger than the sum of its proper divisors (1).

22200491 is an equidigital number, since it uses as much as digits as its factorization.

22200491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 22200491 is about 4711.7396999410. The cubic root of 22200491 is about 281.0525477645.

The spelling of 22200491 in words is "twenty-two million, two hundred thousand, four hundred ninety-one".