28300255531 has 4 divisors (see below), whose sum is σ = 28338865072. Its totient is φ = 28261645992.

The previous prime is 28300255519. The next prime is 28300255537. The reversal of 28300255531 is 13555200382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13555200382 = 2 ⋅6777600191.

It is a cyclic number.

It is not a de Polignac number, because 28300255531 - 2⁵ = 28300255499 is a prime.

It is a super-2 number, since 2×28300255531² (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 (28300255537) 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, 19303671 + ... + 19305136.

It is an arithmetic number, because the mean of its divisors is an integer number (7084716268).

Almost surely, 2^28300255531 is an apocalyptic number.

28300255531 is a deficient number, since it is larger than the sum of its proper divisors (38609541).

28300255531 is an equidigital number, since it uses as much as digits as its factorization.

28300255531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38609540.

The product of its (nonzero) digits is 36000, while the sum is 34.

The spelling of 28300255531 in words is "twenty-eight billion, three hundred million, two hundred fifty-five thousand, five hundred thirty-one".