172112212 has 6 divisors (see below), whose sum is σ = 301196378. Its totient is φ = 86056104.

The previous prime is 172112183. The next prime is 172112231. The reversal of 172112212 is 212211271.

It can be written as a sum of positive squares in only one way, i.e., 148937616 + 23174596 = 12204^2 + 4814^2 .

It is a super-2 number, since 2×172112212² = 59245227039065888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 172112212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21514023 + ... + 21514030.

Almost surely, 2^172112212 is an apocalyptic number.

It is an amenable number.

172112212 is a deficient number, since it is larger than the sum of its proper divisors (129084166).

172112212 is a wasteful number, since it uses less digits than its factorization.

172112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43028057 (or 43028055 counting only the distinct ones).

The product of its digits is 112, while the sum is 19.

The square root of 172112212 is about 13119.1543934813. The cubic root of 172112212 is about 556.2506891882.

Adding to 172112212 its reverse (212211271), we get a palindrome (384323483).

The spelling of 172112212 in words is "one hundred seventy-two million, one hundred twelve thousand, two hundred twelve".