513130021 has 8 divisors (see below), whose sum is σ = 523625760. Its totient is φ = 502694352.

The previous prime is 513130003. The next prime is 513130027. The reversal of 513130021 is 120031315.

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 513130021 - 2¹¹ = 513127973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 513129977 and 513130004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513130027) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2446 + ... + 32128.

It is an arithmetic number, because the mean of its divisors is an integer number (65453220).

Almost surely, 2^513130021 is an apocalyptic number.

It is an amenable number.

513130021 is a deficient number, since it is larger than the sum of its proper divisors (10495739).

513130021 is a wasteful number, since it uses less digits than its factorization.

513130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30035.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 513130021 is about 22652.3734076586. The cubic root of 513130021 is about 800.5881201416.

Adding to 513130021 its reverse (120031315), we get a palindrome (633161336).

The spelling of 513130021 in words is "five hundred thirteen million, one hundred thirty thousand, twenty-one".