823172755 has 16 divisors (see below), whose sum is σ = 995328000. Its totient is φ = 653542240.

The previous prime is 823172741. The next prime is 823172761. The reversal of 823172755 is 557271328.

It is a happy number.

823172755 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 823172755 - 2⁵ = 823172723 is a prime.

It is a super-2 number, since 2×823172755² = 1355226769148580050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571326 + ... + 572764.

It is an arithmetic number, because the mean of its divisors is an integer number (62208000).

Almost surely, 2^823172755 is an apocalyptic number.

823172755 is a deficient number, since it is larger than the sum of its proper divisors (172155245).

823172755 is a wasteful number, since it uses less digits than its factorization.

823172755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2234.

The product of its digits is 117600, while the sum is 40.

The square root of 823172755 is about 28690.9873479460. The cubic root of 823172755 is about 937.1957906015.

The spelling of 823172755 in words is "eight hundred twenty-three million, one hundred seventy-two thousand, seven hundred fifty-five".