4318917521 has 2 divisors, whose sum is σ = 4318917522. Its totient is φ = 4318917520.

The previous prime is 4318917503. The next prime is 4318917527. The reversal of 4318917521 is 1257198134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3948739921 + 370177600 = 62839^2 + 19240^2 .

It is a cyclic number.

It is not a de Polignac number, because 4318917521 - 2¹⁸ = 4318655377 is a prime.

It is not a weakly prime, because it can be changed into another prime (4318917527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2159458760 + 2159458761.

It is an arithmetic number, because the mean of its divisors is an integer number (2159458761).

Almost surely, 2^4318917521 is an apocalyptic number.

It is an amenable number.

4318917521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4318917521 is an equidigital number, since it uses as much as digits as its factorization.

4318917521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 41.

The square root of 4318917521 is about 65718.4716879509. The cubic root of 4318917521 is about 1628.5145261828.

The spelling of 4318917521 in words is "four billion, three hundred eighteen million, nine hundred seventeen thousand, five hundred twenty-one".