5221365491 has 2 divisors, whose sum is σ = 5221365492. Its totient is φ = 5221365490.

The previous prime is 5221365389. The next prime is 5221365517. The reversal of 5221365491 is 1945631225.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5221365491 - 2²² = 5217171187 is a prime.

It is not a weakly prime, because it can be changed into another prime (5221365691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2610682745 + 2610682746.

It is an arithmetic number, because the mean of its divisors is an integer number (2610682746).

Almost surely, 2^5221365491 is an apocalyptic number.

5221365491 is a deficient number, since it is larger than the sum of its proper divisors (1).

5221365491 is an equidigital number, since it uses as much as digits as its factorization.

5221365491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

The square root of 5221365491 is about 72259.0166761215. The cubic root of 5221365491 is about 1734.8477406547.

The spelling of 5221365491 in words is "five billion, two hundred twenty-one million, three hundred sixty-five thousand, four hundred ninety-one".