5201621 has 2 divisors, whose sum is σ = 5201622. Its totient is φ = 5201620.

The previous prime is 5201593. The next prime is 5201627. The reversal of 5201621 is 1261025.

5201621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4622500 + 579121 = 2150^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 5201621 - 2²² = 1007317 is a prime.

It is a super-2 number, since 2×5201621² = 54113722055282, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5201621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5201627) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2600810 + 2600811.

It is an arithmetic number, because the mean of its divisors is an integer number (2600811).

Almost surely, 2^5201621 is an apocalyptic number.

It is an amenable number.

5201621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5201621 is an equidigital number, since it uses as much as digits as its factorization.

5201621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 5201621 is about 2280.7062502655. The cubic root of 5201621 is about 173.2658214234.

Adding to 5201621 its reverse (1261025), we get a palindrome (6462646).

The spelling of 5201621 in words is "five million, two hundred one thousand, six hundred twenty-one".