21828552222439 has 2 divisors, whose sum is σ = 21828552222440. Its totient is φ = 21828552222438.

The previous prime is 21828552222431. The next prime is 21828552222479. The reversal of 21828552222439 is 93422225582812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21828552222439 - 2³ = 21828552222431 is a prime.

It is a super-2 number, since 2×21828552222439² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21828552222439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21828552222431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10914276111219 + 10914276111220.

It is an arithmetic number, because the mean of its divisors is an integer number (10914276111220).

Almost surely, 2^{21828552222439} is an apocalyptic number.

21828552222439 is a deficient number, since it is larger than the sum of its proper divisors (1).

21828552222439 is an equidigital number, since it uses as much as digits as its factorization.

21828552222439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11059200, while the sum is 55.

The spelling of 21828552222439 in words is "twenty-one trillion, eight hundred twenty-eight billion, five hundred fifty-two million, two hundred twenty-two thousand, four hundred thirty-nine".