105424221 has 8 divisors (see below), whose sum is σ = 160646464. Its totient is φ = 60242400.

The previous prime is 105424219. The next prime is 105424223. The reversal of 105424221 is 122424501.

It is an interprime number because it is at equal distance from previous prime (105424219) and next prime (105424223).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 105424221 - 2¹ = 105424219 is a prime.

It is a super-2 number, since 2×105424221² = 22228532746913682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 5020201 = 105424221 / (1 + 0 + 5 + 4 + 2 + 4 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105424223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2510080 + ... + 2510121.

It is an arithmetic number, because the mean of its divisors is an integer number (20080808).

Almost surely, 2^105424221 is an apocalyptic number.

It is an amenable number.

105424221 is a deficient number, since it is larger than the sum of its proper divisors (55222243).

105424221 is an equidigital number, since it uses as much as digits as its factorization.

105424221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5020211.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 105424221 is about 10267.6297654327. The cubic root of 105424221 is about 472.4038918773.

Adding to 105424221 its reverse (122424501), we get a palindrome (227848722).

The spelling of 105424221 in words is "one hundred five million, four hundred twenty-four thousand, two hundred twenty-one".