22194427 has 2 divisors, whose sum is σ = 22194428. Its totient is φ = 22194426.

The previous prime is 22194373. The next prime is 22194437. The reversal of 22194427 is 72449122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22194427 is a prime.

It is not a weakly prime, because it can be changed into another prime (22194437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11097213 + 11097214.

It is an arithmetic number, because the mean of its divisors is an integer number (11097214).

Almost surely, 2^22194427 is an apocalyptic number.

22194427 is a deficient number, since it is larger than the sum of its proper divisors (1).

22194427 is an equidigital number, since it uses as much as digits as its factorization.

22194427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 22194427 is about 4711.0961569469. The cubic root of 22194427 is about 281.0269558704.

The spelling of 22194427 in words is "twenty-two million, one hundred ninety-four thousand, four hundred twenty-seven".