513011613 has 4 divisors (see below), whose sum is σ = 684015488. Its totient is φ = 342007740.

The previous prime is 513011599. The next prime is 513011641. The reversal of 513011613 is 316110315.

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 not a de Polignac number, because 513011613 - 2⁸ = 513011357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 513011613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513011663) 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, 85501933 + ... + 85501938.

It is an arithmetic number, because the mean of its divisors is an integer number (171003872).

Almost surely, 2^513011613 is an apocalyptic number.

It is an amenable number.

513011613 is a deficient number, since it is larger than the sum of its proper divisors (171003875).

513011613 is a wasteful number, since it uses less digits than its factorization.

513011613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171003874.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 513011613 is about 22649.7596675991. The cubic root of 513011613 is about 800.5265351457.

Adding to 513011613 its reverse (316110315), we get a palindrome (829121928).

The spelling of 513011613 in words is "five hundred thirteen million, eleven thousand, six hundred thirteen".