52215661652 has 72 divisors (see below), whose sum is σ = 116063303328. Its totient is φ = 20325547200.

The previous prime is 52215661651. The next prime is 52215661669. The reversal of 52215661652 is 25616651225.

It is a super-2 number, since 2×52215661652² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52215661651) 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, 2535983 + ... + 2556489.

It is an arithmetic number, because the mean of its divisors is an integer number (1611990324).

Almost surely, 2^52215661652 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 52215661652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58031651664).

52215661652 is an abundant number, since it is smaller than the sum of its proper divisors (63847641676).

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

52215661652 is a wasteful number, since it uses less digits than its factorization.

52215661652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21717 (or 21708 counting only the distinct ones).

The product of its digits is 216000, while the sum is 41.

The spelling of 52215661652 in words is "fifty-two billion, two hundred fifteen million, six hundred sixty-one thousand, six hundred fifty-two".