5247517621 has 2 divisors, whose sum is σ = 5247517622. Its totient is φ = 5247517620.

The previous prime is 5247517601. The next prime is 5247517633. The reversal of 5247517621 is 1267157425.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5247408721 + 108900 = 72439^2 + 330^2 .

It is a cyclic number.

It is not a de Polignac number, because 5247517621 - 2⁵ = 5247517589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5247517601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2623758810 + 2623758811.

It is an arithmetic number, because the mean of its divisors is an integer number (2623758811).

Almost surely, 2^5247517621 is an apocalyptic number.

It is an amenable number.

5247517621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5247517621 is an equidigital number, since it uses as much as digits as its factorization.

5247517621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117600, while the sum is 40.

The square root of 5247517621 is about 72439.7516630199. The cubic root of 5247517621 is about 1737.7393486050.

The spelling of 5247517621 in words is "five billion, two hundred forty-seven million, five hundred seventeen thousand, six hundred twenty-one".