28253110331 has 4 divisors (see below), whose sum is σ = 28265731200. Its totient is φ = 28240489464.

The previous prime is 28253110321. The next prime is 28253110381. The reversal of 28253110331 is 13301135282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28253110331 is a prime.

It is a super-2 number, since 2×28253110331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28253110294 and 28253110303.

It is not an unprimeable number, because it can be changed into a prime (28253110321) 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, 6307076 + ... + 6311553.

It is an arithmetic number, because the mean of its divisors is an integer number (7066432800).

Almost surely, 2^28253110331 is an apocalyptic number.

28253110331 is a deficient number, since it is larger than the sum of its proper divisors (12620869).

28253110331 is a wasteful number, since it uses less digits than its factorization.

28253110331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12620868.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 28253110331 in words is "twenty-eight billion, two hundred fifty-three million, one hundred ten thousand, three hundred thirty-one".