520681224 has 32 divisors (see below), whose sum is σ = 1487661120. Its totient is φ = 148766016.

The previous prime is 520681207. The next prime is 520681247. The reversal of 520681224 is 422186025.

It is a super-2 number, since 2×520681224² = 542217874052276352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 520681191 and 520681200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1549479 + ... + 1549814.

It is an arithmetic number, because the mean of its divisors is an integer number (46489410).

Almost surely, 2^520681224 is an apocalyptic number.

It is an amenable number.

520681224 is an abundant number, since it is smaller than the sum of its proper divisors (966979896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520681224 is a wasteful number, since it uses less digits than its factorization.

520681224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099309 (or 3099305 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 520681224 is about 22818.4404375058. The cubic root of 520681224 is about 804.4961542403.

The spelling of 520681224 in words is "five hundred twenty million, six hundred eighty-one thousand, two hundred twenty-four".