513872110217 has 4 divisors (see below), whose sum is σ = 514088844816. Its totient is φ = 513655375620.

The previous prime is 513872110201. The next prime is 513872110243. The reversal of 513872110217 is 712011278315.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 513872110217 - 2⁴ = 513872110201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513872110277) 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, 108363743 + ... + 108368484.

It is an arithmetic number, because the mean of its divisors is an integer number (128522211204).

Almost surely, 2^513872110217 is an apocalyptic number.

It is an amenable number.

513872110217 is a deficient number, since it is larger than the sum of its proper divisors (216734599).

513872110217 is a wasteful number, since it uses less digits than its factorization.

513872110217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216734598.

The product of its (nonzero) digits is 23520, while the sum is 38.

The spelling of 513872110217 in words is "five hundred thirteen billion, eight hundred seventy-two million, one hundred ten thousand, two hundred seventeen".