513940815 has 32 divisors (see below), whose sum is σ = 914630400. Its totient is φ = 273814560.

The previous prime is 513940789. The next prime is 513940849. The reversal of 513940815 is 518049315.

It is not a de Polignac number, because 513940815 - 2¹⁰ = 513939791 is a prime.

It is a super-2 number, since 2×513940815² = 528270322645728450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 513940815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211960 + ... + 214370.

It is an arithmetic number, because the mean of its divisors is an integer number (28582200).

Almost surely, 2^513940815 is an apocalyptic number.

513940815 is a deficient number, since it is larger than the sum of its proper divisors (400689585).

513940815 is a wasteful number, since it uses less digits than its factorization.

513940815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004 (or 3998 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 513940815 is about 22670.2627907133. The cubic root of 513940815 is about 801.0095665791.

It can be divided in two parts, 5139 and 40815, that added together give a palindrome (45954).

The spelling of 513940815 in words is "five hundred thirteen million, nine hundred forty thousand, eight hundred fifteen".