28231222213283 has 4 divisors (see below), whose sum is σ = 28231260843120. Its totient is φ = 28231183583448.

The previous prime is 28231222213279. The next prime is 28231222213301. The reversal of 28231222213283 is 38231222213282.

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 28231222213283 - 2² = 28231222213279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28231222213283.

It is not an unprimeable number, because it can be changed into a prime (28231222213583) 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, 18197135 + ... + 19687512.

It is an arithmetic number, because the mean of its divisors is an integer number (7057815210780).

Almost surely, 2^{28231222213283} is an apocalyptic number.

28231222213283 is a deficient number, since it is larger than the sum of its proper divisors (38629837).

28231222213283 is an equidigital number, since it uses as much as digits as its factorization.

28231222213283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38629836.

The product of its digits is 221184, while the sum is 41.

Subtracting 28231222213283 from its reverse (38231222213282), we obtain a palindrome (9999999999999).

The spelling of 28231222213283 in words is "twenty-eight trillion, two hundred thirty-one billion, two hundred twenty-two million, two hundred thirteen thousand, two hundred eighty-three".