172113515 has 16 divisors (see below), whose sum is σ = 238338048. Its totient is φ = 116872416.

The previous prime is 172113509. The next prime is 172113523. The reversal of 172113515 is 515311271.

172113515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 172113515 - 2⁸ = 172113259 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20267 + ... + 27476.

It is an arithmetic number, because the mean of its divisors is an integer number (14896128).

Almost surely, 2^172113515 is an apocalyptic number.

172113515 is a deficient number, since it is larger than the sum of its proper divisors (66224533).

172113515 is a wasteful number, since it uses less digits than its factorization.

172113515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47858.

The product of its digits is 1050, while the sum is 26.

The square root of 172113515 is about 13119.2040536002. The cubic root of 172113515 is about 556.2520929097.

Adding to 172113515 its reverse (515311271), we get a palindrome (687424786).

The spelling of 172113515 in words is "one hundred seventy-two million, one hundred thirteen thousand, five hundred fifteen".