4544315221 has 2 divisors, whose sum is σ = 4544315222. Its totient is φ = 4544315220.

The previous prime is 4544315201. The next prime is 4544315249. The reversal of 4544315221 is 1225134454.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4531174596 + 13140625 = 67314^2 + 3625^2 .

It is a cyclic number.

It is not a de Polignac number, because 4544315221 - 2⁷ = 4544315093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4544315201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2272157610 + 2272157611.

It is an arithmetic number, because the mean of its divisors is an integer number (2272157611).

Almost surely, 2^4544315221 is an apocalyptic number.

It is an amenable number.

4544315221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4544315221 is an equidigital number, since it uses as much as digits as its factorization.

4544315221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 31.

The square root of 4544315221 is about 67411.5362604948. The cubic root of 4544315221 is about 1656.3653991392.

Adding to 4544315221 its reverse (1225134454), we get a palindrome (5769449675).

The spelling of 4544315221 in words is "four billion, five hundred forty-four million, three hundred fifteen thousand, two hundred twenty-one".