28213499131 has 2 divisors, whose sum is σ = 28213499132. Its totient is φ = 28213499130.

The previous prime is 28213499113. The next prime is 28213499143. The reversal of 28213499131 is 13199431282.

Together with previous prime (28213499113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28213499131 - 2⁵ = 28213499099 is a prime.

It is a super-2 number, since 2×28213499131² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28213494131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14106749565 + 14106749566.

It is an arithmetic number, because the mean of its divisors is an integer number (14106749566).

Almost surely, 2^28213499131 is an apocalyptic number.

28213499131 is a deficient number, since it is larger than the sum of its proper divisors (1).

28213499131 is an equidigital number, since it uses as much as digits as its factorization.

28213499131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 43.

The spelling of 28213499131 in words is "twenty-eight billion, two hundred thirteen million, four hundred ninety-nine thousand, one hundred thirty-one".