22081047 has 4 divisors (see below), whose sum is σ = 29441400. Its totient is φ = 14720696.

The previous prime is 22081043. The next prime is 22081049. The reversal of 22081047 is 74018022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22081047 - 2² = 22081043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22081043) 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 in 3 ways as a sum of consecutive naturals, for example, 3680172 + ... + 3680177.

It is an arithmetic number, because the mean of its divisors is an integer number (7360350).

Almost surely, 2^22081047 is an apocalyptic number.

22081047 is a deficient number, since it is larger than the sum of its proper divisors (7360353).

22081047 is an equidigital number, since it uses as much as digits as its factorization.

22081047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7360352.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 22081047 is about 4699.0474566661. The cubic root of 22081047 is about 280.5475975799.

Adding to 22081047 its reverse (74018022), we get a palindrome (96099069).

The spelling of 22081047 in words is "twenty-two million, eighty-one thousand, forty-seven".