22556047 has 2 divisors, whose sum is σ = 22556048. Its totient is φ = 22556046.

The previous prime is 22555993. The next prime is 22556063. The reversal of 22556047 is 74065522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22556047 - 2¹⁹ = 22031759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22556087) 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, 11278023 + 11278024.

It is an arithmetic number, because the mean of its divisors is an integer number (11278024).

Almost surely, 2^22556047 is an apocalyptic number.

22556047 is a deficient number, since it is larger than the sum of its proper divisors (1).

22556047 is an equidigital number, since it uses as much as digits as its factorization.

22556047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 22556047 is about 4749.3206882669. The cubic root of 22556047 is about 282.5450242801.

The spelling of 22556047 in words is "twenty-two million, five hundred fifty-six thousand, forty-seven".