172245216 has 96 divisors (see below), whose sum is σ = 531232128. Its totient is φ = 48176640.

The previous prime is 172245209. The next prime is 172245217. The reversal of 172245216 is 612542271.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172245217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7455 + ... + 20001.

It is an arithmetic number, because the mean of its divisors is an integer number (5533668).

Almost surely, 2^172245216 is an apocalyptic number.

172245216 is a gapful number since it is divisible by the number (16) 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 172245216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265616064).

172245216 is an abundant number, since it is smaller than the sum of its proper divisors (358986912).

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

172245216 is a wasteful number, since it uses less digits than its factorization.

172245216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12584 (or 12576 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 172245216 is about 13124.2224912564. Note that the first 3 decimals coincide. The cubic root of 172245216 is about 556.3939378213.

Adding to 172245216 its reverse (612542271), we get a palindrome (784787487).

The spelling of 172245216 in words is "one hundred seventy-two million, two hundred forty-five thousand, two hundred sixteen".