172200505 has 8 divisors (see below), whose sum is σ = 213306624. Its totient is φ = 133316400.

The previous prime is 172200491. The next prime is 172200593. The reversal of 172200505 is 505002271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172200505 - 2⁵ = 172200473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555331 + ... + 555640.

It is an arithmetic number, because the mean of its divisors is an integer number (26663328).

Almost surely, 2^172200505 is an apocalyptic number.

It is an amenable number.

172200505 is a deficient number, since it is larger than the sum of its proper divisors (41106119).

172200505 is a wasteful number, since it uses less digits than its factorization.

172200505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111007.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 172200505 is about 13122.5190036060. The cubic root of 172200505 is about 556.3457911872.

Adding to 172200505 its reverse (505002271), we get a palindrome (677202776).

The spelling of 172200505 in words is "one hundred seventy-two million, two hundred thousand, five hundred five".