513050520109 has 2 divisors, whose sum is σ = 513050520110. Its totient is φ = 513050520108.

The previous prime is 513050520097. The next prime is 513050520127. The reversal of 513050520109 is 901025050315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 296404024900 + 216646495209 = 544430^2 + 465453^2 .

It is a cyclic number.

It is not a de Polignac number, because 513050520109 - 2⁵ = 513050520077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513050527109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256525260054 + 256525260055.

It is an arithmetic number, because the mean of its divisors is an integer number (256525260055).

Almost surely, 2^513050520109 is an apocalyptic number.

It is an amenable number.

513050520109 is a deficient number, since it is larger than the sum of its proper divisors (1).

513050520109 is an equidigital number, since it uses as much as digits as its factorization.

513050520109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6750, while the sum is 31.

The spelling of 513050520109 in words is "five hundred thirteen billion, fifty million, five hundred twenty thousand, one hundred nine".