172270085 has 16 divisors (see below), whose sum is σ = 223534080. Its totient is φ = 126696000.

The previous prime is 172270081. The next prime is 172270103. The reversal of 172270085 is 580072271.

It is not a de Polignac number, because 172270085 - 2² = 172270081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172270081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11036 + ... + 21594.

It is an arithmetic number, because the mean of its divisors is an integer number (13970880).

Almost surely, 2^172270085 is an apocalyptic number.

It is an amenable number.

172270085 is a deficient number, since it is larger than the sum of its proper divisors (51263995).

172270085 is a wasteful number, since it uses less digits than its factorization.

172270085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10828.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 172270085 is about 13125.1699036622. The cubic root of 172270085 is about 556.4207141720.

The spelling of 172270085 in words is "one hundred seventy-two million, two hundred seventy thousand, eighty-five".