172226305 has 16 divisors (see below), whose sum is σ = 213076944. Its totient is φ = 133539840.

The previous prime is 172226287. The next prime is 172226347. The reversal of 172226305 is 503622271.

It can be written as a sum of positive squares in 8 ways, for example, as 39538944 + 132687361 = 6288^2 + 11519^2 .

It is not a de Polignac number, because 172226305 - 2⁷ = 172226177 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50329 + ... + 53641.

It is an arithmetic number, because the mean of its divisors is an integer number (13317309).

Almost surely, 2^172226305 is an apocalyptic number.

It is an amenable number.

172226305 is a deficient number, since it is larger than the sum of its proper divisors (40850639).

172226305 is a wasteful number, since it uses less digits than its factorization.

172226305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3636.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 172226305 is about 13123.5020097533. The cubic root of 172226305 is about 556.3735746996.

Adding to 172226305 its reverse (503622271), we get a palindrome (675848576).

The spelling of 172226305 in words is "one hundred seventy-two million, two hundred twenty-six thousand, three hundred five".