172216120 has 64 divisors (see below), whose sum is σ = 412322400. Its totient is φ = 64512000.

The previous prime is 172216087. The next prime is 172216139. The reversal of 172216120 is 21612271.

It is a happy number.

172216120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 172216091 and 172216100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170176 + ... + 171184.

Almost surely, 2^172216120 is an apocalyptic number.

172216120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172216120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206161200).

172216120 is an abundant number, since it is smaller than the sum of its proper divisors (240106280).

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

172216120 is a wasteful number, since it uses less digits than its factorization.

172216120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288 (or 1284 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 172216120 is about 13123.1139597277. The cubic root of 172216120 is about 556.3626070050.

Adding to 172216120 its reverse (21612271), we get a palindrome (193828391).

The spelling of 172216120 in words is "one hundred seventy-two million, two hundred sixteen thousand, one hundred twenty".