5548707821 has 2 divisors, whose sum is σ = 5548707822. Its totient is φ = 5548707820.

The previous prime is 5548707767. The next prime is 5548707823. The reversal of 5548707821 is 1287078455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5098674025 + 450033796 = 71405^2 + 21214^2 .

It is a cyclic number.

It is not a de Polignac number, because 5548707821 - 2⁶ = 5548707757 is a prime.

It is a Sophie Germain prime.

Together with 5548707823, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5548707823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2774353910 + 2774353911.

It is an arithmetic number, because the mean of its divisors is an integer number (2774353911).

Almost surely, 2^5548707821 is an apocalyptic number.

It is an amenable number.

5548707821 is a deficient number, since it is larger than the sum of its proper divisors (1).

5548707821 is an equidigital number, since it uses as much as digits as its factorization.

5548707821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 627200, while the sum is 47.

The square root of 5548707821 is about 74489.6490862992. The cubic root of 5548707821 is about 1770.3696357412.

The spelling of 5548707821 in words is "five billion, five hundred forty-eight million, seven hundred seven thousand, eight hundred twenty-one".