172540555 has 12 divisors (see below), whose sum is σ = 227583216. Its totient is φ = 125483600.

The previous prime is 172540523. The next prime is 172540573. The reversal of 172540555 is 555045271.

It is not a de Polignac number, because 172540555 - 2⁵ = 172540523 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 172540555.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141991 + ... + 143200.

It is an arithmetic number, because the mean of its divisors is an integer number (18965268).

Almost surely, 2^172540555 is an apocalyptic number.

172540555 is a deficient number, since it is larger than the sum of its proper divisors (55042661).

172540555 is a wasteful number, since it uses less digits than its factorization.

172540555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285218 (or 285207 counting only the distinct ones).

The product of its (nonzero) digits is 35000, while the sum is 34.

The square root of 172540555 is about 13135.4693482951. The cubic root of 172540555 is about 556.7117618377.

The spelling of 172540555 in words is "one hundred seventy-two million, five hundred forty thousand, five hundred fifty-five".