513217 has 4 divisors (see below), whose sum is σ = 516096. Its totient is φ = 510340.

The previous prime is 513203. The next prime is 513239. The reversal of 513217 is 712315.

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 513217 - 2¹¹ = 511169 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 513194 and 513203.

It is not an unprimeable number, because it can be changed into a prime (513257) 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, 1153 + ... + 1534.

It is an arithmetic number, because the mean of its divisors is an integer number (129024).

2⁵¹³²¹⁷ is an apocalyptic number.

It is an amenable number.

513217 is a deficient number, since it is larger than the sum of its proper divisors (2879).

513217 is a wasteful number, since it uses less digits than its factorization.

513217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878.

The product of its digits is 210, while the sum is 19.

The square root of 513217 is about 716.3916526594. The cubic root of 513217 is about 80.0633352615.

The spelling of 513217 in words is "five hundred thirteen thousand, two hundred seventeen".