52221217128 has 32 divisors (see below), whose sum is σ = 137424256800. Its totient is φ = 16490910528.

The previous prime is 52221217091. The next prime is 52221217129. The reversal of 52221217128 is 82171212225.

It is not an unprimeable number, because it can be changed into a prime (52221217129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57259651 + ... + 57260562.

It is an arithmetic number, because the mean of its divisors is an integer number (4294508025).

Almost surely, 2^52221217128 is an apocalyptic number.

It is an amenable number.

52221217128 is an abundant number, since it is smaller than the sum of its proper divisors (85203039672).

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

52221217128 is a wasteful number, since it uses less digits than its factorization.

52221217128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114520241 (or 114520237 counting only the distinct ones).

The product of its digits is 8960, while the sum is 33.

The spelling of 52221217128 in words is "fifty-two billion, two hundred twenty-one million, two hundred seventeen thousand, one hundred twenty-eight".