172517053 has 4 divisors (see below), whose sum is σ = 176724828. Its totient is φ = 168309280.

The previous prime is 172517039. The next prime is 172517087. The reversal of 172517053 is 350715271.

172517053 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 350715271 = 41 ⋅8554031.

It can be written as a sum of positive squares in 2 ways, for example, as 85710564 + 86806489 = 9258^2 + 9317^2 .

It is a cyclic number.

It is not a de Polignac number, because 172517053 - 2⁹ = 172516541 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172517153) 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, 2103826 + ... + 2103907.

It is an arithmetic number, because the mean of its divisors is an integer number (44181207).

Almost surely, 2^172517053 is an apocalyptic number.

It is an amenable number.

172517053 is a deficient number, since it is larger than the sum of its proper divisors (4207775).

172517053 is an equidigital number, since it uses as much as digits as its factorization.

172517053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4207774.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 172517053 is about 13134.5747171349. The cubic root of 172517053 is about 556.6864838503.

The spelling of 172517053 in words is "one hundred seventy-two million, five hundred seventeen thousand, fifty-three".