6530000621 has 2 divisors, whose sum is σ = 6530000622. Its totient is φ = 6530000620.

The previous prime is 6530000591. The next prime is 6530000629. The reversal of 6530000621 is 1260000356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5839099396 + 690901225 = 76414^2 + 26285^2 .

It is a cyclic number.

It is not a de Polignac number, because 6530000621 - 2¹⁸ = 6529738477 is a prime.

It is a super-2 number, since 2×6530000621² = 85281816220520771282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6530000629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3265000310 + 3265000311.

It is an arithmetic number, because the mean of its divisors is an integer number (3265000311).

Almost surely, 2^6530000621 is an apocalyptic number.

It is an amenable number.

6530000621 is a deficient number, since it is larger than the sum of its proper divisors (1).

6530000621 is an equidigital number, since it uses as much as digits as its factorization.

6530000621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 6530000621 is about 80808.4192457692. The cubic root of 6530000621 is about 1869.1223942062.

Adding to 6530000621 its reverse (1260000356), we get a palindrome (7790000977).

The spelling of 6530000621 in words is "six billion, five hundred thirty million, six hundred twenty-one", and thus it is an aban number.