22247791 has 2 divisors, whose sum is σ = 22247792. Its totient is φ = 22247790.

The previous prime is 22247773. The next prime is 22247821. The reversal of 22247791 is 19774222.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22247791 - 2⁵ = 22247759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22247741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11123895 + 11123896.

It is an arithmetic number, because the mean of its divisors is an integer number (11123896).

Almost surely, 2^22247791 is an apocalyptic number.

22247791 is a deficient number, since it is larger than the sum of its proper divisors (1).

22247791 is an equidigital number, since it uses as much as digits as its factorization.

22247791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 34.

The square root of 22247791 is about 4716.7564066846. The cubic root of 22247791 is about 281.2520081503.

The spelling of 22247791 in words is "twenty-two million, two hundred forty-seven thousand, seven hundred ninety-one".