28056271331 has 12 divisors (see below), whose sum is σ = 31111635576. Its totient is φ = 25279974720.

The previous prime is 28056271307. The next prime is 28056271333. The reversal of 28056271331 is 13317265082.

It is a de Polignac number, because none of the positive numbers 2^k-28056271331 is a prime.

It is a super-2 number, since 2×28056271331² (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 (28056271333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1012301 + ... + 1039646.

It is an arithmetic number, because the mean of its divisors is an integer number (2592636298).

Almost surely, 2^28056271331 is an apocalyptic number.

28056271331 is a deficient number, since it is larger than the sum of its proper divisors (3055364245).

28056271331 is a wasteful number, since it uses less digits than its factorization.

28056271331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052082 (or 2052071 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 28056271331 in words is "twenty-eight billion, fifty-six million, two hundred seventy-one thousand, three hundred thirty-one".