28622221231 has 2 divisors, whose sum is σ = 28622221232. Its totient is φ = 28622221230.

The previous prime is 28622221219. The next prime is 28622221273. The reversal of 28622221231 is 13212222682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28622221231 - 2²³ = 28613832623 is a prime.

It is a super-2 number, since 2×28622221231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28622221193 and 28622221202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28622228231) 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, 14311110615 + 14311110616.

It is an arithmetic number, because the mean of its divisors is an integer number (14311110616).

Almost surely, 2^28622221231 is an apocalyptic number.

28622221231 is a deficient number, since it is larger than the sum of its proper divisors (1).

28622221231 is an equidigital number, since it uses as much as digits as its factorization.

28622221231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 31.

The spelling of 28622221231 in words is "twenty-eight billion, six hundred twenty-two million, two hundred twenty-one thousand, two hundred thirty-one".