5219942521 has 2 divisors, whose sum is σ = 5219942522. Its totient is φ = 5219942520.

The previous prime is 5219942509. The next prime is 5219942543. The reversal of 5219942521 is 1252499125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4172514025 + 1047428496 = 64595^2 + 32364^2 .

It is a cyclic number.

It is not a de Polignac number, because 5219942521 - 2²⁵ = 5186388089 is a prime.

It is not a weakly prime, because it can be changed into another prime (5219942501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2609971260 + 2609971261.

It is an arithmetic number, because the mean of its divisors is an integer number (2609971261).

Almost surely, 2^5219942521 is an apocalyptic number.

It is an amenable number.

5219942521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5219942521 is an equidigital number, since it uses as much as digits as its factorization.

5219942521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 40.

The square root of 5219942521 is about 72249.1696907307. The cubic root of 5219942521 is about 1734.6901279519.

The spelling of 5219942521 in words is "five billion, two hundred nineteen million, nine hundred forty-two thousand, five hundred twenty-one".