22543221700447 has 4 divisors (see below), whose sum is σ = 25763681943376. Its totient is φ = 19322761457520.

The previous prime is 22543221700397. The next prime is 22543221700469. The reversal of 22543221700447 is 74400712234522.

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 22543221700447 - 2¹⁵ = 22543221667679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22543221740447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610230121454 + ... + 1610230121467.

It is an arithmetic number, because the mean of its divisors is an integer number (6440920485844).

Almost surely, 2^{22543221700447} is an apocalyptic number.

22543221700447 is a deficient number, since it is larger than the sum of its proper divisors (3220460242929).

22543221700447 is an equidigital number, since it uses as much as digits as its factorization.

22543221700447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220460242928.

The product of its (nonzero) digits is 752640, while the sum is 43.

Adding to 22543221700447 its reverse (74400712234522), we get a palindrome (96943933934969).

The spelling of 22543221700447 in words is "twenty-two trillion, five hundred forty-three billion, two hundred twenty-one million, seven hundred thousand, four hundred forty-seven".