172371212 has 18 divisors (see below), whose sum is σ = 326639628. Its totient is φ = 79555632.

The previous prime is 172371193. The next prime is 172371247. The reversal of 172371212 is 212173271.

It is a Harshad number since it is a multiple of its sum of digits (26).

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 in 5 ways as a sum of consecutive naturals, for example, 126818 + ... + 128169.

It is an arithmetic number, because the mean of its divisors is an integer number (18146646).

Almost surely, 2^172371212 is an apocalyptic number.

It is an amenable number.

172371212 is a deficient number, since it is larger than the sum of its proper divisors (154268416).

172371212 is a wasteful number, since it uses less digits than its factorization.

172371212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255017 (or 255002 counting only the distinct ones).

The product of its digits is 1176, while the sum is 26.

The square root of 172371212 is about 13129.0217457357. The cubic root of 172371212 is about 556.5295706626.

The spelling of 172371212 in words is "one hundred seventy-two million, three hundred seventy-one thousand, two hundred twelve".