52217472 has 128 divisors (see below), whose sum is σ = 154958400. Its totient is φ = 15482880.

The previous prime is 52217441. The next prime is 52217479. The reversal of 52217472 is 27471225.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (52217479) 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, 123822 + ... + 124242.

Almost surely, 2^52217472 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 52217472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77479200).

52217472 is an abundant number, since it is smaller than the sum of its proper divisors (102740928).

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

52217472 is a wasteful number, since it uses less digits than its factorization.

52217472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 462 counting only the distinct ones).

The product of its digits is 7840, while the sum is 30.

The square root of 52217472 is about 7226.1657883002. The cubic root of 52217472 is about 373.7707231903.

Adding to 52217472 its reverse (27471225), we get a palindrome (79688697).

The spelling of 52217472 in words is "fifty-two million, two hundred seventeen thousand, four hundred seventy-two".