172216110 has 64 divisors (see below), whose sum is σ = 455445504. Its totient is φ = 41328000.

The previous prime is 172216087. The next prime is 172216139. The reversal of 172216110 is 11612271.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30747 + ... + 35913.

It is an arithmetic number, because the mean of its divisors is an integer number (7116336).

Almost surely, 2^172216110 is an apocalyptic number.

172216110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 172216110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227722752).

172216110 is an abundant number, since it is smaller than the sum of its proper divisors (283229394).

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

172216110 is a wasteful number, since it uses less digits than its factorization.

172216110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5289.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 172216110 is about 13123.1135787206. The cubic root of 172216110 is about 556.3625962363.

Adding to 172216110 its reverse (11612271), we get a palindrome (183828381).

The spelling of 172216110 in words is "one hundred seventy-two million, two hundred sixteen thousand, one hundred ten".