172997100715 has 4 divisors (see below), whose sum is σ = 207596520864. Its totient is φ = 138397680568.

The previous prime is 172997100707. The next prime is 172997100797. The reversal of 172997100715 is 517001799271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 517001799271 = 419 ⋅1233894509.

It is a cyclic number.

It is not a de Polignac number, because 172997100715 - 2³ = 172997100707 is a prime.

It is a super-3 number, since 3×172997100715³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (49) 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17299710067 + ... + 17299710076.

It is an arithmetic number, because the mean of its divisors is an integer number (51899130216).

Almost surely, 2^172997100715 is an apocalyptic number.

172997100715 is a deficient number, since it is larger than the sum of its proper divisors (34599420149).

172997100715 is an equidigital number, since it uses as much as digits as its factorization.

172997100715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34599420148.

The product of its (nonzero) digits is 277830, while the sum is 49.

Adding to 172997100715 its reverse (517001799271), we get a palindrome (689998899986).

The spelling of 172997100715 in words is "one hundred seventy-two billion, nine hundred ninety-seven million, one hundred thousand, seven hundred fifteen".