513501613 has 4 divisors (see below), whose sum is σ = 514006560. Its totient is φ = 512996668.

The previous prime is 513501559. The next prime is 513501617. The reversal of 513501613 is 316105315.

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 513501613 - 2⁹ = 513501101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513501617) 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, 250945 + ... + 252982.

It is an arithmetic number, because the mean of its divisors is an integer number (128501640).

Almost surely, 2^513501613 is an apocalyptic number.

It is an amenable number.

513501613 is a deficient number, since it is larger than the sum of its proper divisors (504947).

513501613 is a wasteful number, since it uses less digits than its factorization.

513501613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504946.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 513501613 is about 22660.5739777262. The cubic root of 513501613 is about 800.7813267663.

Adding to 513501613 its reverse (316105315), we get a palindrome (829606928).

The spelling of 513501613 in words is "five hundred thirteen million, five hundred one thousand, six hundred thirteen".