172212118 has 16 divisors (see below), whose sum is σ = 278648496. Its totient is φ = 79351200.

The previous prime is 172212101. The next prime is 172212149. The reversal of 172212118 is 811212271.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 172212092 and 172212101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11568 + ... + 21868.

It is an arithmetic number, because the mean of its divisors is an integer number (17415531).

Almost surely, 2^172212118 is an apocalyptic number.

172212118 is a deficient number, since it is larger than the sum of its proper divisors (106436378).

172212118 is a wasteful number, since it uses less digits than its factorization.

172212118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10959.

The product of its digits is 448, while the sum is 25.

The square root of 172212118 is about 13122.9614797880. The cubic root of 172212118 is about 556.3582973418.

Adding to 172212118 its reverse (811212271), we get a palindrome (983424389).

The spelling of 172212118 in words is "one hundred seventy-two million, two hundred twelve thousand, one hundred eighteen".