520532231 has 4 divisors (see below), whose sum is σ = 551151792. Its totient is φ = 489912672.

The previous prime is 520532219. The next prime is 520532237. The reversal of 520532231 is 132235025.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520532231 is a prime.

It is a super-2 number, since 2×520532231² = 541907607019674722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520532197 and 520532206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520532237) 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, 15309755 + ... + 15309788.

It is an arithmetic number, because the mean of its divisors is an integer number (137787948).

Almost surely, 2^520532231 is an apocalyptic number.

520532231 is a deficient number, since it is larger than the sum of its proper divisors (30619561).

520532231 is a wasteful number, since it uses less digits than its factorization.

520532231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30619560.

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

The square root of 520532231 is about 22815.1754540700. The cubic root of 520532231 is about 804.4194113601.

Adding to 520532231 its reverse (132235025), we get a palindrome (652767256).

The spelling of 520532231 in words is "five hundred twenty million, five hundred thirty-two thousand, two hundred thirty-one".