6389522281 has 2 divisors, whose sum is σ = 6389522282. Its totient is φ = 6389522280.

The previous prime is 6389522261. The next prime is 6389522387. The reversal of 6389522281 is 1822259836.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5347265625 + 1042256656 = 73125^2 + 32284^2 .

It is a cyclic number.

It is not a de Polignac number, because 6389522281 - 2²³ = 6381133673 is a prime.

It is a super-2 number, since 2×6389522281² = 81651989958790885922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6389522221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3194761140 + 3194761141.

It is an arithmetic number, because the mean of its divisors is an integer number (3194761141).

Almost surely, 2^6389522281 is an apocalyptic number.

It is an amenable number.

6389522281 is a deficient number, since it is larger than the sum of its proper divisors (1).

6389522281 is an equidigital number, since it uses as much as digits as its factorization.

6389522281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 46.

The square root of 6389522281 is about 79934.4874318964. The cubic root of 6389522281 is about 1855.6217870377.

The spelling of 6389522281 in words is "six billion, three hundred eighty-nine million, five hundred twenty-two thousand, two hundred eighty-one".