4517241221 has 2 divisors, whose sum is σ = 4517241222. Its totient is φ = 4517241220.

The previous prime is 4517241199. The next prime is 4517241263. The reversal of 4517241221 is 1221427154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4517184100 + 57121 = 67210^2 + 239^2 .

It is a cyclic number.

It is not a de Polignac number, because 4517241221 - 2¹⁰ = 4517240197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4517241271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2258620610 + 2258620611.

It is an arithmetic number, because the mean of its divisors is an integer number (2258620611).

Almost surely, 2^4517241221 is an apocalyptic number.

It is an amenable number.

4517241221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4517241221 is an equidigital number, since it uses as much as digits as its factorization.

4517241221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4480, while the sum is 29.

The square root of 4517241221 is about 67210.4249428614. The cubic root of 4517241221 is about 1653.0694283684.

Adding to 4517241221 its reverse (1221427154), we get a palindrome (5738668375).

The spelling of 4517241221 in words is "four billion, five hundred seventeen million, two hundred forty-one thousand, two hundred twenty-one".