172211612 has 12 divisors (see below), whose sum is σ = 301549416. Its totient is φ = 86054640.

The previous prime is 172211609. The next prime is 172211617. The reversal of 172211612 is 216112271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172211617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4643 + ... + 19130.

It is an arithmetic number, because the mean of its divisors is an integer number (25129118).

Almost surely, 2^172211612 is an apocalyptic number.

It is an amenable number.

172211612 is a deficient number, since it is larger than the sum of its proper divisors (129337804).

172211612 is a wasteful number, since it uses less digits than its factorization.

172211612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25588 (or 25586 counting only the distinct ones).

The product of its digits is 336, while the sum is 23.

The square root of 172211612 is about 13122.9422005890. The cubic root of 172211612 is about 556.3577524371.

Adding to 172211612 its reverse (216112271), we get a palindrome (388323883).

The spelling of 172211612 in words is "one hundred seventy-two million, two hundred eleven thousand, six hundred twelve".