172017115 has 16 divisors (see below), whose sum is σ = 215923968. Its totient is φ = 131307616.

The previous prime is 172017103. The next prime is 172017119. The reversal of 172017115 is 511710271.

It is a cyclic number.

It is not a de Polignac number, because 172017115 - 2¹³ = 172008923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172017115.

It is not an unprimeable number, because it can be changed into a prime (172017119) 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 15 ways as a sum of consecutive naturals, for example, 52104 + ... + 55306.

It is an arithmetic number, because the mean of its divisors is an integer number (13495248).

Almost surely, 2^172017115 is an apocalyptic number.

172017115 is a deficient number, since it is larger than the sum of its proper divisors (43906853).

172017115 is a wasteful number, since it uses less digits than its factorization.

172017115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3698.

The product of its (nonzero) digits is 490, while the sum is 25.

The square root of 172017115 is about 13115.5295356307. The cubic root of 172017115 is about 556.1482220890.

Adding to 172017115 its reverse (511710271), we get a palindrome (683727386).

The spelling of 172017115 in words is "one hundred seventy-two million, seventeen thousand, one hundred fifteen".