28321075331 has 2 divisors, whose sum is σ = 28321075332. Its totient is φ = 28321075330.

The previous prime is 28321075247. The next prime is 28321075351. The reversal of 28321075331 is 13357012382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28321075331 - 2¹⁰ = 28321074307 is a prime.

It is a super-2 number, since 2×28321075331² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28321075291 and 28321075300.

It is not a weakly prime, because it can be changed into another prime (28321075351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14160537665 + 14160537666.

It is an arithmetic number, because the mean of its divisors is an integer number (14160537666).

Almost surely, 2^28321075331 is an apocalyptic number.

28321075331 is a deficient number, since it is larger than the sum of its proper divisors (1).

28321075331 is an equidigital number, since it uses as much as digits as its factorization.

28321075331 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 35.

The spelling of 28321075331 in words is "twenty-eight billion, three hundred twenty-one million, seventy-five thousand, three hundred thirty-one".