530403521 has 4 divisors (see below), whose sum is σ = 547513344. Its totient is φ = 513293700.

The previous prime is 530403509. The next prime is 530403541. The reversal of 530403521 is 125304035.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125304035 = 5 ⋅25060807.

It is a cyclic number.

It is not a de Polignac number, because 530403521 - 2¹⁰ = 530402497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (530403541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8554865 + ... + 8554926.

It is an arithmetic number, because the mean of its divisors is an integer number (136878336).

Almost surely, 2^530403521 is an apocalyptic number.

It is an amenable number.

530403521 is a deficient number, since it is larger than the sum of its proper divisors (17109823).

530403521 is a wasteful number, since it uses less digits than its factorization.

530403521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17109822.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 530403521 is about 23030.4911150414. The cubic root of 530403521 is about 809.4725626910.

Adding to 530403521 its reverse (125304035), we get a palindrome (655707556).

The spelling of 530403521 in words is "five hundred thirty million, four hundred three thousand, five hundred twenty-one".