52215521988 has 96 divisors (see below), whose sum is σ = 143170069504. Its totient is φ = 14498725248.

The previous prime is 52215521957. The next prime is 52215521999. The reversal of 52215521988 is 88912551225.

It is a super-2 number, since 2×52215521988² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2809695 + ... + 2828217.

Almost surely, 2^52215521988 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 52215521988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71585034752).

52215521988 is an abundant number, since it is smaller than the sum of its proper divisors (90954547516).

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

52215521988 is a wasteful number, since it uses less digits than its factorization.

52215521988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19481 (or 19479 counting only the distinct ones).

The product of its digits is 576000, while the sum is 48.

The spelling of 52215521988 in words is "fifty-two billion, two hundred fifteen million, five hundred twenty-one thousand, nine hundred eighty-eight".