4523541221 has 2 divisors, whose sum is σ = 4523541222. Its totient is φ = 4523541220.

The previous prime is 4523541163. The next prime is 4523541229. The reversal of 4523541221 is 1221453254.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3463322500 + 1060218721 = 58850^2 + 32561^2 .

It is a cyclic number.

It is not a de Polignac number, because 4523541221 - 2⁶ = 4523541157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4523541229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2261770610 + 2261770611.

It is an arithmetic number, because the mean of its divisors is an integer number (2261770611).

Almost surely, 2^4523541221 is an apocalyptic number.

It is an amenable number.

4523541221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4523541221 is an equidigital number, since it uses as much as digits as its factorization.

4523541221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 29.

The square root of 4523541221 is about 67257.2763424152. The cubic root of 4523541221 is about 1653.8375594143.

Adding to 4523541221 its reverse (1221453254), we get a palindrome (5744994475).

The spelling of 4523541221 in words is "four billion, five hundred twenty-three million, five hundred forty-one thousand, two hundred twenty-one".