22247947 has 2 divisors, whose sum is σ = 22247948. Its totient is φ = 22247946.

The previous prime is 22247933. The next prime is 22247963. The reversal of 22247947 is 74974222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22247947 - 2¹⁹ = 21723659 is a prime.

It is a super-2 number, since 2×22247947² = 989942291429618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22242947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11123973 + 11123974.

It is an arithmetic number, because the mean of its divisors is an integer number (11123974).

Almost surely, 2^22247947 is an apocalyptic number.

22247947 is a deficient number, since it is larger than the sum of its proper divisors (1).

22247947 is an equidigital number, since it uses as much as digits as its factorization.

22247947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 37.

The square root of 22247947 is about 4716.7729434434. The cubic root of 22247947 is about 281.2526655221.

The spelling of 22247947 in words is "twenty-two million, two hundred forty-seven thousand, nine hundred forty-seven".