513131513 has 8 divisors (see below), whose sum is σ = 526091808. Its totient is φ = 500217984.

The previous prime is 513131501. The next prime is 513131551. The reversal of 513131513 is 315131315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 513131513 - 2⁴ = 513131497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513134513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11081 + ... + 33897.

It is an arithmetic number, because the mean of its divisors is an integer number (65761476).

Almost surely, 2^513131513 is an apocalyptic number.

It is an amenable number.

513131513 is a deficient number, since it is larger than the sum of its proper divisors (12960295).

513131513 is a wasteful number, since it uses less digits than its factorization.

513131513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23383.

The product of its digits is 675, while the sum is 23.

The square root of 513131513 is about 22652.4063401662. The cubic root of 513131513 is about 800.5888960829.

Adding to 513131513 its reverse (315131315), we get a palindrome (828262828).

The spelling of 513131513 in words is "five hundred thirteen million, one hundred thirty-one thousand, five hundred thirteen".