172226856 has 64 divisors (see below), whose sum is σ = 439560000. Its totient is φ = 56222208.

The previous prime is 172226797. The next prime is 172226893. The reversal of 172226856 is 658622271.

172226856 = T₁₃ + T₁₄ + ... + T₁₀₁₀.

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, 344895 + ... + 345393.

It is an arithmetic number, because the mean of its divisors is an integer number (6868125).

Almost surely, 2^172226856 is an apocalyptic number.

It is an amenable number.

172226856 is an abundant number, since it is smaller than the sum of its proper divisors (267333144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172226856 is a wasteful number, since it uses less digits than its factorization.

172226856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778 (or 774 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 172226856 is about 13123.5230026087. The cubic root of 172226856 is about 556.3741680304.

The spelling of 172226856 in words is "one hundred seventy-two million, two hundred twenty-six thousand, eight hundred fifty-six".