513540050251 has 2 divisors, whose sum is σ = 513540050252. Its totient is φ = 513540050250.

The previous prime is 513540050249. The next prime is 513540050269. The reversal of 513540050251 is 152050045315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513540050251 - 2¹ = 513540050249 is a prime.

Together with 513540050249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (513540060251) 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, 256770025125 + 256770025126.

It is an arithmetic number, because the mean of its divisors is an integer number (256770025126).

Almost surely, 2^513540050251 is an apocalyptic number.

513540050251 is a deficient number, since it is larger than the sum of its proper divisors (1).

513540050251 is an equidigital number, since it uses as much as digits as its factorization.

513540050251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15000, while the sum is 31.

Adding to 513540050251 its reverse (152050045315), we get a palindrome (665590095566).

The spelling of 513540050251 in words is "five hundred thirteen billion, five hundred forty million, fifty thousand, two hundred fifty-one".