52172856 has 64 divisors (see below), whose sum is σ = 149940000. Its totient is φ = 16789248.

The previous prime is 52172851. The next prime is 52172893. The reversal of 52172856 is 65827125.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 52172856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52172851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2100 + ... + 10428.

Almost surely, 2^52172856 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 52172856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74970000).

52172856 is an abundant number, since it is smaller than the sum of its proper divisors (97767144).

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

52172856 is a wasteful number, since it uses less digits than its factorization.

52172856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8373 (or 8363 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 52172856 is about 7223.0780142540. The cubic root of 52172856 is about 373.6642396340.

The spelling of 52172856 in words is "fifty-two million, one hundred seventy-two thousand, eight hundred fifty-six".