105228905 has 4 divisors (see below), whose sum is σ = 126274692. Its totient is φ = 84183120.

The previous prime is 105228901. The next prime is 105228923. The reversal of 105228905 is 509822501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 509822501 = 7079 ⋅72019.

It can be written as a sum of positive squares in 2 ways, for example, as 53114944 + 52113961 = 7288^2 + 7219^2 .

It is not a de Polignac number, because 105228905 - 2² = 105228901 is a prime.

It is a super-2 number, since 2×105228905² = 22146244894998050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105228901) 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, 10522886 + ... + 10522895.

It is an arithmetic number, because the mean of its divisors is an integer number (31568673).

Almost surely, 2^105228905 is an apocalyptic number.

It is an amenable number.

105228905 is a deficient number, since it is larger than the sum of its proper divisors (21045787).

105228905 is an equidigital number, since it uses as much as digits as its factorization.

105228905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21045786.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 105228905 is about 10258.1141054289. The cubic root of 105228905 is about 472.1119757912. Note that the first 3 decimals are identical.

The spelling of 105228905 in words is "one hundred five million, two hundred twenty-eight thousand, nine hundred five".