172331712 has 168 divisors, whose sum is σ = 585801216. Its totient is φ = 49206528.

The previous prime is 172331699. The next prime is 172331723. The reversal of 172331712 is 217133271.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108073 + ... + 109655.

It is an arithmetic number, because the mean of its divisors is an integer number (3486912).

Almost surely, 2^172331712 is an apocalyptic number.

172331712 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 172331712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292900608).

172331712 is an abundant number, since it is smaller than the sum of its proper divisors (413469504).

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

172331712 is an equidigital number, since it uses as much as digits as its factorization.

172331712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617 (or 1595 counting only the distinct ones).

The product of its digits is 1764, while the sum is 27.

The square root of 172331712 is about 13127.5173585869. The cubic root of 172331712 is about 556.4870566079.

Adding to 172331712 its reverse (217133271), we get a palindrome (389464983).

It can be divided in two parts, 17 and 2331712, that added together give a square (2331729 = 1527²).

The spelling of 172331712 in words is "one hundred seventy-two million, three hundred thirty-one thousand, seven hundred twelve".