5001051821 has 2 divisors, whose sum is σ = 5001051822. Its totient is φ = 5001051820.

The previous prime is 5001051799. The next prime is 5001051829. The reversal of 5001051821 is 1281501005.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4968276196 + 32775625 = 70486^2 + 5725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5001051821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5001051829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2500525910 + 2500525911.

It is an arithmetic number, because the mean of its divisors is an integer number (2500525911).

Almost surely, 2^5001051821 is an apocalyptic number.

It is an amenable number.

5001051821 is a deficient number, since it is larger than the sum of its proper divisors (1).

5001051821 is an equidigital number, since it uses as much as digits as its factorization.

5001051821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 5001051821 is about 70718.1152251670. The cubic root of 5001051821 is about 1710.0958441771.

Adding to 5001051821 its reverse (1281501005), we get a palindrome (6282552826).

The spelling of 5001051821 in words is "five billion, one million, fifty-one thousand, eight hundred twenty-one".