52221652 has 72 divisors (see below), whose sum is σ = 115231200. Its totient is φ = 20575296.

The previous prime is 52221649. The next prime is 52221677. The reversal of 52221652 is 25612225.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137599 + ... + 137977.

Almost surely, 2^52221652 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 52221652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57615600).

52221652 is an abundant number, since it is smaller than the sum of its proper divisors (63009548).

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

52221652 is a wasteful number, since it uses less digits than its factorization.

52221652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 444 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 52221652 is about 7226.4550092006. The cubic root of 52221652 is about 373.7806963524.

Adding to 52221652 its reverse (25612225), we get a palindrome (77833877).

The spelling of 52221652 in words is "fifty-two million, two hundred twenty-one thousand, six hundred fifty-two".