172205716 has 12 divisors (see below), whose sum is σ = 319087188. Its totient is φ = 81037952.

The previous prime is 172205711. The next prime is 172205717. The reversal of 172205716 is 617502271.

It can be written as a sum of positive squares in 2 ways, for example, as 160275600 + 11930116 = 12660^2 + 3454^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172205711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1266151 + ... + 1266286.

It is an arithmetic number, because the mean of its divisors is an integer number (26590599).

Almost surely, 2^172205716 is an apocalyptic number.

It is an amenable number.

172205716 is a deficient number, since it is larger than the sum of its proper divisors (146881472).

172205716 is a wasteful number, since it uses less digits than its factorization.

172205716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532458 (or 2532456 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 172205716 is about 13122.7175539215. The cubic root of 172205716 is about 556.3514030342.

Adding to 172205716 its reverse (617502271), we get a palindrome (789707987).

The spelling of 172205716 in words is "one hundred seventy-two million, two hundred five thousand, seven hundred sixteen".