513044521 has 16 divisors (see below), whose sum is σ = 578467008. Its totient is φ = 450956800.

The previous prime is 513044507. The next prime is 513044537. The reversal of 513044521 is 125440315.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 513044521 - 2⁵ = 513044489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513044561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45930 + ... + 55996.

It is an arithmetic number, because the mean of its divisors is an integer number (36154188).

Almost surely, 2^513044521 is an apocalyptic number.

It is an amenable number.

513044521 is a deficient number, since it is larger than the sum of its proper divisors (65422487).

513044521 is a wasteful number, since it uses less digits than its factorization.

513044521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10232.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 513044521 is about 22650.4861095739. The cubic root of 513044521 is about 800.5436518238.

Adding to 513044521 its reverse (125440315), we get a palindrome (638484836).

The spelling of 513044521 in words is "five hundred thirteen million, forty-four thousand, five hundred twenty-one".