52521216 has 72 divisors (see below), whose sum is σ = 152515104. Its totient is φ = 15912960.

The previous prime is 52521199. The next prime is 52521221. The reversal of 52521216 is 61212525.

It is a happy number.

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

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5340 + ... + 11556.

Almost surely, 2^52521216 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 52521216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76257552).

52521216 is an abundant number, since it is smaller than the sum of its proper divisors (99993888).

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

52521216 is a wasteful number, since it uses less digits than its factorization.

52521216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6247 (or 6233 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 52521216 is about 7247.1522683051. The cubic root of 52521216 is about 374.4940519066.

The spelling of 52521216 in words is "fifty-two million, five hundred twenty-one thousand, two hundred sixteen".