5381100821 has 2 divisors, whose sum is σ = 5381100822. Its totient is φ = 5381100820.

The previous prime is 5381100799. The next prime is 5381100847. The reversal of 5381100821 is 1280011835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2694751921 + 2686348900 = 51911^2 + 51830^2 .

It is a cyclic number.

It is not a de Polignac number, because 5381100821 - 2¹⁸ = 5380838677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5381100121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2690550410 + 2690550411.

It is an arithmetic number, because the mean of its divisors is an integer number (2690550411).

Almost surely, 2^5381100821 is an apocalyptic number.

It is an amenable number.

5381100821 is a deficient number, since it is larger than the sum of its proper divisors (1).

5381100821 is an equidigital number, since it uses as much as digits as its factorization.

5381100821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 5381100821 is about 73355.9869472152. The cubic root of 5381100821 is about 1752.3615270289.

The spelling of 5381100821 in words is "five billion, three hundred eighty-one million, one hundred thousand, eight hundred twenty-one".