172226857 has 8 divisors (see below), whose sum is σ = 188429472. Its totient is φ = 156115200.

The previous prime is 172226797. The next prime is 172226893. The reversal of 172226857 is 758622271.

It is a happy number.

172226857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172226857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172206857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18744 + ... + 26377.

It is an arithmetic number, because the mean of its divisors is an integer number (23553684).

Almost surely, 2^172226857 is an apocalyptic number.

It is an amenable number.

172226857 is a deficient number, since it is larger than the sum of its proper divisors (16202615).

172226857 is a wasteful number, since it uses less digits than its factorization.

172226857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45479.

The product of its digits is 94080, while the sum is 40.

The square root of 172226857 is about 13123.5230407082. The cubic root of 172226857 is about 556.3741691072.

The spelling of 172226857 in words is "one hundred seventy-two million, two hundred twenty-six thousand, eight hundred fifty-seven".