513231205009 has 4 divisors (see below), whose sum is σ = 513242569216. Its totient is φ = 513219840804.

The previous prime is 513231204881. The next prime is 513231205027. The reversal of 513231205009 is 900502132315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 900502132315 = 5 ⋅180100426463.

It is a cyclic number.

It is not a de Polignac number, because 513231205009 - 2⁷ = 513231204881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513231205049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5614089 + ... + 5704774.

It is an arithmetic number, because the mean of its divisors is an integer number (128310642304).

Almost surely, 2^513231205009 is an apocalyptic number.

It is an amenable number.

513231205009 is a deficient number, since it is larger than the sum of its proper divisors (11364207).

513231205009 is a wasteful number, since it uses less digits than its factorization.

513231205009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11364206.

The product of its (nonzero) digits is 8100, while the sum is 31.

The spelling of 513231205009 in words is "five hundred thirteen billion, two hundred thirty-one million, two hundred five thousand, nine".