172755505 has 16 divisors (see below), whose sum is σ = 235005120. Its totient is φ = 120858048.

The previous prime is 172755491. The next prime is 172755511. The reversal of 172755505 is 505557271.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 172755505 - 2⁹ = 172754993 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68707 + ... + 71176.

It is an arithmetic number, because the mean of its divisors is an integer number (14687820).

Almost surely, 2^172755505 is an apocalyptic number.

It is an amenable number.

172755505 is a deficient number, since it is larger than the sum of its proper divisors (62249615).

172755505 is a wasteful number, since it uses less digits than its factorization.

172755505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139920.

The product of its (nonzero) digits is 61250, while the sum is 37.

The square root of 172755505 is about 13143.6488464962. The cubic root of 172755505 is about 556.9428486390.

The spelling of 172755505 in words is "one hundred seventy-two million, seven hundred fifty-five thousand, five hundred five".