172102056 has 128 divisors (see below), whose sum is σ = 508032000. Its totient is φ = 47572992.

The previous prime is 172102027. The next prime is 172102061. The reversal of 172102056 is 650201271.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 961375 + ... + 961553.

It is an arithmetic number, because the mean of its divisors is an integer number (3969000).

Almost surely, 2^172102056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172102056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254016000).

172102056 is an abundant number, since it is smaller than the sum of its proper divisors (335929944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172102056 is a wasteful number, since it uses less digits than its factorization.

172102056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 172102056 is about 13118.7673201410. The cubic root of 172102056 is about 556.2397478900.

The spelling of 172102056 in words is "one hundred seventy-two million, one hundred two thousand, fifty-six".