52015644 has 72 divisors (see below), whose sum is σ = 137166848. Its totient is φ = 16601760.

The previous prime is 52015643. The next prime is 52015669. The reversal of 52015644 is 44651025.

52015644 is a `hidden beast` number, since 5 + 2 + 0 + 15 + 644 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52015643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141549 + ... + 141915.

Almost surely, 2^52015644 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 52015644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68583424).

52015644 is an abundant number, since it is smaller than the sum of its proper divisors (85151204).

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

52015644 is a wasteful number, since it uses less digits than its factorization.

52015644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535 (or 530 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 52015644 is about 7212.1871855908. The cubic root of 52015644 is about 373.2885423163.

Adding to 52015644 its reverse (44651025), we get a palindrome (96666669).

The spelling of 52015644 in words is "fifty-two million, fifteen thousand, six hundred forty-four".