105302221 has 4 divisors (see below), whose sum is σ = 105677244. Its totient is φ = 104927200.

The previous prime is 105302207. The next prime is 105302251. The reversal of 105302221 is 122203501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40322500 + 64979721 = 6350^2 + 8061^2 .

It is a cyclic number.

It is not a de Polignac number, because 105302221 - 2⁵ = 105302189 is a prime.

It is a super-2 number, since 2×105302221² = 22177115495065682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 105302195 and 105302204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105302251) 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 3 ways as a sum of consecutive naturals, for example, 187090 + ... + 187651.

It is an arithmetic number, because the mean of its divisors is an integer number (26419311).

Almost surely, 2^105302221 is an apocalyptic number.

It is an amenable number.

105302221 is a deficient number, since it is larger than the sum of its proper divisors (375023).

105302221 is an equidigital number, since it uses as much as digits as its factorization.

105302221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375022.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 105302221 is about 10261.6870445361. The cubic root of 105302221 is about 472.2215949939.

Adding to 105302221 its reverse (122203501), we get a palindrome (227505722).

The spelling of 105302221 in words is "one hundred five million, three hundred two thousand, two hundred twenty-one".