172055515 has 16 divisors (see below), whose sum is σ = 209318400. Its totient is φ = 135757440.

The previous prime is 172055509. The next prime is 172055627. The reversal of 172055515 is 515550271.

It is not a de Polignac number, because 172055515 - 2⁵ = 172055483 is a prime.

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, 116230 + ... + 117700.

It is an arithmetic number, because the mean of its divisors is an integer number (13082400).

Almost surely, 2^172055515 is an apocalyptic number.

172055515 is a deficient number, since it is larger than the sum of its proper divisors (37262885).

172055515 is a wasteful number, since it uses less digits than its factorization.

172055515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782.

The product of its (nonzero) digits is 8750, while the sum is 31.

The square root of 172055515 is about 13116.9933673842. The cubic root of 172055515 is about 556.1896026668.

The spelling of 172055515 in words is "one hundred seventy-two million, fifty-five thousand, five hundred fifteen".