28321075033 has 2 divisors, whose sum is σ = 28321075034. Its totient is φ = 28321075032.

The previous prime is 28321075019. The next prime is 28321075037. The reversal of 28321075033 is 33057012382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26385778969 + 1935296064 = 162437^2 + 43992^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28321075033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28321075033.

It is not a weakly prime, because it can be changed into another prime (28321075037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14160537516 + 14160537517.

It is an arithmetic number, because the mean of its divisors is an integer number (14160537517).

Almost surely, 2^28321075033 is an apocalyptic number.

It is an amenable number.

28321075033 is a deficient number, since it is larger than the sum of its proper divisors (1).

28321075033 is an equidigital number, since it uses as much as digits as its factorization.

28321075033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 28321075033 in words is "twenty-eight billion, three hundred twenty-one million, seventy-five thousand, thirty-three".