5221541221 has 16 divisors (see below), whose sum is σ = 5921755840. Its totient is φ = 4564200960.

The previous prime is 5221541207. The next prime is 5221541231. The reversal of 5221541221 is 1221451225.

It is a cyclic number.

It is not a de Polignac number, because 5221541221 - 2²³ = 5213152613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5221541231) 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, 986101 + ... + 991381.

It is an arithmetic number, because the mean of its divisors is an integer number (370109740).

Almost surely, 2^5221541221 is an apocalyptic number.

It is an amenable number.

5221541221 is a deficient number, since it is larger than the sum of its proper divisors (700214619).

5221541221 is a wasteful number, since it uses less digits than its factorization.

5221541221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9316.

The product of its digits is 1600, while the sum is 25.

The square root of 5221541221 is about 72260.2326387066. The cubic root of 5221541221 is about 1734.8672030842.

Adding to 5221541221 its reverse (1221451225), we get a palindrome (6442992446).

The spelling of 5221541221 in words is "five billion, two hundred twenty-one million, five hundred forty-one thousand, two hundred twenty-one".