28112342231 has 2 divisors, whose sum is σ = 28112342232. Its totient is φ = 28112342230.

The previous prime is 28112342177. The next prime is 28112342233. The reversal of 28112342231 is 13224321182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28112342231 - 2²² = 28108147927 is a prime.

It is a super-2 number, since 2×28112342231² (a number of 22 digits) contains 22 as substring.

Together with 28112342233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28112342194 and 28112342203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28112342233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14056171115 + 14056171116.

It is an arithmetic number, because the mean of its divisors is an integer number (14056171116).

Almost surely, 2^28112342231 is an apocalyptic number.

28112342231 is a deficient number, since it is larger than the sum of its proper divisors (1).

28112342231 is an equidigital number, since it uses as much as digits as its factorization.

28112342231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 29.

The spelling of 28112342231 in words is "twenty-eight billion, one hundred twelve million, three hundred forty-two thousand, two hundred thirty-one".