172225280 has 72 divisors (see below), whose sum is σ = 415234512. Its totient is φ = 68440064.

The previous prime is 172225279. The next prime is 172225327. The reversal of 172225280 is 82522271.

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 7 ways as a sum of consecutive naturals, for example, 251819 + ... + 252501.

It is an arithmetic number, because the mean of its divisors is an integer number (5767146).

Almost surely, 2^172225280 is an apocalyptic number.

172225280 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 172225280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207617256).

172225280 is an abundant number, since it is smaller than the sum of its proper divisors (243009232).

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

172225280 is an equidigital number, since it uses as much as digits as its factorization.

172225280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901 (or 887 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 172225280 is about 13123.4629576191. The cubic root of 172225280 is about 556.3724709502.

The spelling of 172225280 in words is "one hundred seventy-two million, two hundred twenty-five thousand, two hundred eighty".