28115056313 has 4 divisors (see below), whose sum is σ = 28115708148. Its totient is φ = 28114404480.

The previous prime is 28115056283. The next prime is 28115056349. The reversal of 28115056313 is 31365051182.

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 16014396304 + 12100660009 = 126548^2 + 110003^2 .

It is a cyclic number.

It is not a de Polignac number, because 28115056313 - 2¹⁰ = 28115055289 is a prime.

It is a super-2 number, since 2×28115056313² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28115056363) 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, 256256 + ... + 349137.

It is an arithmetic number, because the mean of its divisors is an integer number (7028927037).

Almost surely, 2^28115056313 is an apocalyptic number.

It is an amenable number.

28115056313 is a deficient number, since it is larger than the sum of its proper divisors (651835).

28115056313 is an equidigital number, since it uses as much as digits as its factorization.

28115056313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651834.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 28115056313 in words is "twenty-eight billion, one hundred fifteen million, fifty-six thousand, three hundred thirteen".