530721513 has 12 divisors (see below), whose sum is σ = 876111808. Its totient is φ = 303269400.

The previous prime is 530721497. The next prime is 530721551. The reversal of 530721513 is 315127035.

It is not a de Polignac number, because 530721513 - 2⁴ = 530721497 is a prime.

It is a super-2 number, since 2×530721513² = 563330648722018338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (530721553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4212013 + ... + 4212138.

Almost surely, 2^530721513 is an apocalyptic number.

It is an amenable number.

530721513 is a deficient number, since it is larger than the sum of its proper divisors (345390295).

530721513 is a wasteful number, since it uses less digits than its factorization.

530721513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8424164 (or 8424161 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 27.

The square root of 530721513 is about 23037.3937979104. The cubic root of 530721513 is about 809.6342976503.

Adding to 530721513 its reverse (315127035), we get a palindrome (845848548).

The spelling of 530721513 in words is "five hundred thirty million, seven hundred twenty-one thousand, five hundred thirteen".