105839221 has 2 divisors, whose sum is σ = 105839222. Its totient is φ = 105839220.

The previous prime is 105839197. The next prime is 105839257. The reversal of 105839221 is 122938501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53436100 + 52403121 = 7310^2 + 7239^2 .

It is a cyclic number.

It is not a de Polignac number, because 105839221 - 2⁵ = 105839189 is a prime.

It is a super-2 number, since 2×105839221² = 22403881403773682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105839281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52919610 + 52919611.

It is an arithmetic number, because the mean of its divisors is an integer number (52919611).

Almost surely, 2^105839221 is an apocalyptic number.

It is an amenable number.

105839221 is a deficient number, since it is larger than the sum of its proper divisors (1).

105839221 is an equidigital number, since it uses as much as digits as its factorization.

105839221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 105839221 is about 10287.8190594508. The cubic root of 105839221 is about 473.0229492714.

The spelling of 105839221 in words is "one hundred five million, eight hundred thirty-nine thousand, two hundred twenty-one".