172227216 has 40 divisors (see below), whose sum is σ = 508481344. Its totient is φ = 49207680.

The previous prime is 172227173. The next prime is 172227233. The reversal of 172227216 is 612722271.

172227216 = T₃ + T₄ + ... + T₁₀₁₀.

It is a super-2 number, since 2×172227216² = 59324427862221312, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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 7 ways as a sum of consecutive naturals, for example, 255955 + ... + 256626.

Almost surely, 2^172227216 is an apocalyptic number.

172227216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

172227216 is an abundant number, since it is smaller than the sum of its proper divisors (336254128).

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

172227216 is a wasteful number, since it uses less digits than its factorization.

172227216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512599 (or 512593 counting only the distinct ones).

The product of its digits is 4704, while the sum is 30.

The square root of 172227216 is about 13123.5367184307. The cubic root of 172227216 is about 556.3745556869.

Adding to 172227216 its reverse (612722271), we get a palindrome (784949487).

The spelling of 172227216 in words is "one hundred seventy-two million, two hundred twenty-seven thousand, two hundred sixteen".