2505550813 has 2 divisors, whose sum is σ = 2505550814. Its totient is φ = 2505550812.

The previous prime is 2505550811. The next prime is 2505550829. The reversal of 2505550813 is 3180555052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2505302809 + 248004 = 50053^2 + 498^2 .

It is a cyclic number.

It is not a de Polignac number, because 2505550813 - 2¹ = 2505550811 is a prime.

Together with 2505550811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2505550811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1252775406 + 1252775407.

It is an arithmetic number, because the mean of its divisors is an integer number (1252775407).

Almost surely, 2^2505550813 is an apocalyptic number.

It is an amenable number.

2505550813 is a deficient number, since it is larger than the sum of its proper divisors (1).

2505550813 is an equidigital number, since it uses as much as digits as its factorization.

2505550813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30000, while the sum is 34.

The square root of 2505550813 is about 50055.4773526334. The cubic root of 2505550813 is about 1358.2125474274.

The spelling of 2505550813 in words is "two billion, five hundred five million, five hundred fifty thousand, eight hundred thirteen".