5211056621 has 2 divisors, whose sum is σ = 5211056622. Its totient is φ = 5211056620.

The previous prime is 5211056611. The next prime is 5211056623. The reversal of 5211056621 is 1266501125.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4662841225 + 548215396 = 68285^2 + 23414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5211056621 is a prime.

It is a super-2 number, since 2×5211056621² = 54310222214535875282, which contains 22 as substring.

Together with 5211056623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5211056623) 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, 2605528310 + 2605528311.

It is an arithmetic number, because the mean of its divisors is an integer number (2605528311).

Almost surely, 2^5211056621 is an apocalyptic number.

It is an amenable number.

5211056621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5211056621 is an equidigital number, since it uses as much as digits as its factorization.

5211056621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 5211056621 is about 72187.6486734400. The cubic root of 5211056621 is about 1733.7052487892.

Adding to 5211056621 its reverse (1266501125), we get a palindrome (6477557746).

The spelling of 5211056621 in words is "five billion, two hundred eleven million, fifty-six thousand, six hundred twenty-one".