5234545621 has 2 divisors, whose sum is σ = 5234545622. Its totient is φ = 5234545620.

The previous prime is 5234545529. The next prime is 5234545663. The reversal of 5234545621 is 1265454325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4896500625 + 338044996 = 69975^2 + 18386^2 .

It is a cyclic number.

It is not a de Polignac number, because 5234545621 - 2⁷ = 5234545493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5234555621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2617272810 + 2617272811.

It is an arithmetic number, because the mean of its divisors is an integer number (2617272811).

Almost surely, 2^5234545621 is an apocalyptic number.

It is an amenable number.

5234545621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5234545621 is an equidigital number, since it uses as much as digits as its factorization.

5234545621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144000, while the sum is 37.

The square root of 5234545621 is about 72350.1597855872. The cubic root of 5234545621 is about 1736.3062547895.

Adding to 5234545621 its reverse (1265454325), we get a palindrome (6499999946).

The spelling of 5234545621 in words is "five billion, two hundred thirty-four million, five hundred forty-five thousand, six hundred twenty-one".