226505905 has 4 divisors (see below), whose sum is σ = 271807092. Its totient is φ = 181204720.

The previous prime is 226505891. The next prime is 226505911. The reversal of 226505905 is 509505622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 509505622 = 2 ⋅254752811.

It can be written as a sum of positive squares in 2 ways, for example, as 178730161 + 47775744 = 13369^2 + 6912^2 .

It is a de Polignac number, because none of the positive numbers 2^k-226505905 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22650586 + ... + 22650595.

It is an arithmetic number, because the mean of its divisors is an integer number (67951773).

Almost surely, 2^226505905 is an apocalyptic number.

It is an amenable number.

226505905 is a deficient number, since it is larger than the sum of its proper divisors (45301187).

226505905 is an equidigital number, since it uses as much as digits as its factorization.

226505905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45301186.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 226505905 is about 15050.1131224984. The cubic root of 226505905 is about 609.5741047563.

The spelling of 226505905 in words is "two hundred twenty-six million, five hundred five thousand, nine hundred five".