8513054621 has 2 divisors, whose sum is σ = 8513054622. Its totient is φ = 8513054620.

The previous prime is 8513054617. The next prime is 8513054701. The reversal of 8513054621 is 1264503158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7954677721 + 558376900 = 89189^2 + 23630^2 .

It is a cyclic number.

It is not a de Polignac number, because 8513054621 - 2² = 8513054617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8513054321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4256527310 + 4256527311.

It is an arithmetic number, because the mean of its divisors is an integer number (4256527311).

Almost surely, 2^8513054621 is an apocalyptic number.

It is an amenable number.

8513054621 is a deficient number, since it is larger than the sum of its proper divisors (1).

8513054621 is an equidigital number, since it uses as much as digits as its factorization.

8513054621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 8513054621 is about 92266.2160327387. The cubic root of 8513054621 is about 2041.8718098782.

Adding to 8513054621 its reverse (1264503158), we get a palindrome (9777557779).

The spelling of 8513054621 in words is "eight billion, five hundred thirteen million, fifty-four thousand, six hundred twenty-one".