52221215312 has 60 divisors (see below), whose sum is σ = 117726834420. Its totient is φ = 22374955008.

The previous prime is 52221215279. The next prime is 52221215341. The reversal of 52221215312 is 21351212225.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2956749376 + 49264465936 = 54376^2 + 221956^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5380448 + ... + 5390144.

It is an arithmetic number, because the mean of its divisors is an integer number (1962113907).

Almost surely, 2^52221215312 is an apocalyptic number.

It is an amenable number.

52221215312 is an abundant number, since it is smaller than the sum of its proper divisors (65505619108).

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

52221215312 is a wasteful number, since it uses less digits than its factorization.

52221215312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16588 (or 16575 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

Adding to 52221215312 its reverse (21351212225), we get a palindrome (73572427537).

The spelling of 52221215312 in words is "fifty-two billion, two hundred twenty-one million, two hundred fifteen thousand, three hundred twelve".