172715081 has 8 divisors (see below), whose sum is σ = 215333184. Its totient is φ = 134583120.

The previous prime is 172715077. The next prime is 172715089. The reversal of 172715081 is 180517271.

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

It is not a de Polignac number, because 172715081 - 2² = 172715077 is a prime.

It is a super-2 number, since 2×172715081² = 59660998409673122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172715089) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1121450 + ... + 1121603.

It is an arithmetic number, because the mean of its divisors is an integer number (26916648).

Almost surely, 2^172715081 is an apocalyptic number.

172715081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

172715081 is a deficient number, since it is larger than the sum of its proper divisors (42618103).

172715081 is a wasteful number, since it uses less digits than its factorization.

172715081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243071.

The product of its (nonzero) digits is 3920, while the sum is 32.

The square root of 172715081 is about 13142.1109795953. The cubic root of 172715081 is about 556.8994045551.

The spelling of 172715081 in words is "one hundred seventy-two million, seven hundred fifteen thousand, eighty-one".