513404520 has 64 divisors (see below), whose sum is σ = 1576048320. Its totient is φ = 133722624.

The previous prime is 513404503. The next prime is 513404533. The reversal of 513404520 is 25404315.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44589 + ... + 54908.

It is an arithmetic number, because the mean of its divisors is an integer number (24625755).

Almost surely, 2^513404520 is an apocalyptic number.

It is an amenable number.

513404520 is an abundant number, since it is smaller than the sum of its proper divisors (1062643800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

513404520 is a wasteful number, since it uses less digits than its factorization.

513404520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99554 (or 99550 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 513404520 is about 22658.4315432468. The cubic root of 513404520 is about 800.7308529475.

Adding to 513404520 its reverse (25404315), we get a palindrome (538808835).

The spelling of 513404520 in words is "five hundred thirteen million, four hundred four thousand, five hundred twenty".