28213194227 has 2 divisors, whose sum is σ = 28213194228. Its totient is φ = 28213194226.

The previous prime is 28213194223. The next prime is 28213194307. The reversal of 28213194227 is 72249131282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28213194227 - 2² = 28213194223 is a prime.

It is a super-2 number, since 2×28213194227² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28213194223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14106597113 + 14106597114.

It is an arithmetic number, because the mean of its divisors is an integer number (14106597114).

Almost surely, 2^28213194227 is an apocalyptic number.

28213194227 is a deficient number, since it is larger than the sum of its proper divisors (1).

28213194227 is an equidigital number, since it uses as much as digits as its factorization.

28213194227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 41.

The spelling of 28213194227 in words is "twenty-eight billion, two hundred thirteen million, one hundred ninety-four thousand, two hundred twenty-seven".