5221550661 has 16 divisors (see below), whose sum is σ = 6993829440. Its totient is φ = 3465175680.

The previous prime is 5221550641. The next prime is 5221550699. The reversal of 5221550661 is 1660551225.

5221550661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5221550661 - 2¹⁵ = 5221517893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5221550641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1412826 + ... + 1416516.

It is an arithmetic number, because the mean of its divisors is an integer number (437114340).

Almost surely, 2^5221550661 is an apocalyptic number.

It is an amenable number.

5221550661 is a deficient number, since it is larger than the sum of its proper divisors (1772278779).

5221550661 is a wasteful number, since it uses less digits than its factorization.

5221550661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5716.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 5221550661 is about 72260.2979581457. The cubic root of 5221550661 is about 1734.8682485696.

The spelling of 5221550661 in words is "five billion, two hundred twenty-one million, five hundred fifty thousand, six hundred sixty-one".