172244575272 has 128 divisors (see below), whose sum is σ = 537185986560. Its totient is φ = 44712203520.

The previous prime is 172244575247. The next prime is 172244575273. The reversal of 172244575272 is 272575442271.

It is not an unprimeable number, because it can be changed into a prime (172244575273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3175693 + ... + 3229475.

It is an arithmetic number, because the mean of its divisors is an integer number (4196765520).

Almost surely, 2^172244575272 is an apocalyptic number.

172244575272 is a gapful number since it is divisible by the number (12) 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 172244575272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268592993280).

172244575272 is an abundant number, since it is smaller than the sum of its proper divisors (364941411288).

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

172244575272 is a wasteful number, since it uses less digits than its factorization.

172244575272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55543 (or 55539 counting only the distinct ones).

The product of its digits is 2195200, while the sum is 48.

The spelling of 172244575272 in words is "one hundred seventy-two billion, two hundred forty-four million, five hundred seventy-five thousand, two hundred seventy-two".