172226836 has 6 divisors (see below), whose sum is σ = 301396970. Its totient is φ = 86113416.

The previous prime is 172226797. The next prime is 172226893. The reversal of 172226836 is 638622271.

It can be written as a sum of positive squares in only one way, i.e., 96432400 + 75794436 = 9820^2 + 8706^2 .

It is a junction number, because it is equal to n+sod(n) for n = 172226795 and 172226804.

It is a congruent 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 as a sum of consecutive naturals, namely, 21528351 + ... + 21528358.

Almost surely, 2^172226836 is an apocalyptic number.

It is an amenable number.

172226836 is a deficient number, since it is larger than the sum of its proper divisors (129170134).

172226836 is a wasteful number, since it uses less digits than its factorization.

172226836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43056713 (or 43056711 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 172226836 is about 13123.5222406182. The cubic root of 172226836 is about 556.3741464939.

The spelling of 172226836 in words is "one hundred seventy-two million, two hundred twenty-six thousand, eight hundred thirty-six".