5424215821 has 2 divisors, whose sum is σ = 5424215822. Its totient is φ = 5424215820.

The previous prime is 5424215813. The next prime is 5424215851. The reversal of 5424215821 is 1285124245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4837898025 + 586317796 = 69555^2 + 24214^2 .

It is a cyclic number.

It is not a de Polignac number, because 5424215821 - 2³ = 5424215813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5424215851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2712107910 + 2712107911.

It is an arithmetic number, because the mean of its divisors is an integer number (2712107911).

Almost surely, 2^5424215821 is an apocalyptic number.

It is an amenable number.

5424215821 is a deficient number, since it is larger than the sum of its proper divisors (1).

5424215821 is an equidigital number, since it uses as much as digits as its factorization.

5424215821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25600, while the sum is 34.

The square root of 5424215821 is about 73649.2757669755. The cubic root of 5424215821 is about 1757.0292321778.

The spelling of 5424215821 in words is "five billion, four hundred twenty-four million, two hundred fifteen thousand, eight hundred twenty-one".