5181503909 has 2 divisors, whose sum is σ = 5181503910. Its totient is φ = 5181503908.

The previous prime is 5181503881. The next prime is 5181503911. The reversal of 5181503909 is 9093051815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5173924900 + 7579009 = 71930^2 + 2753^2 .

It is a cyclic number.

It is not a de Polignac number, because 5181503909 - 2²⁸ = 4913068453 is a prime.

Together with 5181503911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5181503209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2590751954 + 2590751955.

It is an arithmetic number, because the mean of its divisors is an integer number (2590751955).

Almost surely, 2^5181503909 is an apocalyptic number.

It is an amenable number.

5181503909 is a deficient number, since it is larger than the sum of its proper divisors (1).

5181503909 is an equidigital number, since it uses as much as digits as its factorization.

5181503909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 41.

The square root of 5181503909 is about 71982.6639476478. The cubic root of 5181503909 is about 1730.4216630631.

The spelling of 5181503909 in words is "five billion, one hundred eighty-one million, five hundred three thousand, nine hundred nine".