28213273071733 has 4 divisors (see below), whose sum is σ = 28213602670828. Its totient is φ = 28212943472640.

The previous prime is 28213273071671. The next prime is 28213273071749. The reversal of 28213273071733 is 33717037231282.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25369928438449 + 2843344633284 = 5036857^2 + 1686222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28213273071733 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 (28213273071433) 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, 164671116 + ... + 164842357.

It is an arithmetic number, because the mean of its divisors is an integer number (7053400667707).

Almost surely, 2^{28213273071733} is an apocalyptic number.

It is an amenable number.

28213273071733 is a deficient number, since it is larger than the sum of its proper divisors (329599095).

28213273071733 is an equidigital number, since it uses as much as digits as its factorization.

28213273071733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329599094.

The product of its (nonzero) digits is 1778112, while the sum is 49.

The spelling of 28213273071733 in words is "twenty-eight trillion, two hundred thirteen billion, two hundred seventy-three million, seventy-one thousand, seven hundred thirty-three".