22043947 has 2 divisors, whose sum is σ = 22043948. Its totient is φ = 22043946.

The previous prime is 22043941. The next prime is 22043963. The reversal of 22043947 is 74934022.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22043947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22043941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11021973 + 11021974.

It is an arithmetic number, because the mean of its divisors is an integer number (11021974).

Almost surely, 2^22043947 is an apocalyptic number.

22043947 is a deficient number, since it is larger than the sum of its proper divisors (1).

22043947 is an equidigital number, since it uses as much as digits as its factorization.

22043947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 22043947 is about 4695.0981885366. The cubic root of 22043947 is about 280.3903865778.

Adding to 22043947 its reverse (74934022), we get a palindrome (96977969).

The spelling of 22043947 in words is "twenty-two million, forty-three thousand, nine hundred forty-seven".