5221656576 has 120 divisors (see below), whose sum is σ = 15597191610. Its totient is φ = 1740496896.

The previous prime is 5221656571. The next prime is 5221656577. The reversal of 5221656576 is 6756561225.

5221656576 is a `hidden beast` number, since 5 + 2 + 2 + 16 + 565 + 76 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4124722176 + 1096934400 = 64224^2 + 33120^2 .

It is not an unprimeable number, because it can be changed into a prime (5221656571) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 150150 + ... + 181626.

Almost surely, 2^5221656576 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 5221656576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7798595805).

5221656576 is an abundant number, since it is smaller than the sum of its proper divisors (10375535034).

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

5221656576 is an equidigital number, since it uses as much as digits as its factorization.

5221656576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31511 (or 31482 counting only the distinct ones).

The product of its digits is 756000, while the sum is 45.

The square root of 5221656576 is about 72261.0308257501. The cubic root of 5221656576 is about 1734.8799786309.

The spelling of 5221656576 in words is "five billion, two hundred twenty-one million, six hundred fifty-six thousand, five hundred seventy-six".