520553331 has 16 divisors (see below), whose sum is σ = 774046720. Its totient is φ = 345750120.

The previous prime is 520553309. The next prime is 520553347. The reversal of 520553331 is 133355025.

It is not a de Polignac number, because 520553331 - 2⁹ = 520552819 is a prime.

It is a super-2 number, since 2×520553331² = 541951540830391122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520553295 and 520553304.

It is not an unprimeable number, because it can be changed into a prime (520553381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28255 + ... + 42888.

It is an arithmetic number, because the mean of its divisors is an integer number (48377920).

Almost surely, 2^520553331 is an apocalyptic number.

520553331 is a deficient number, since it is larger than the sum of its proper divisors (253493389).

520553331 is a wasteful number, since it uses less digits than its factorization.

520553331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71423 (or 71417 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 27.

The square root of 520553331 is about 22815.6378609058. The cubic root of 520553331 is about 804.4302803766.

The spelling of 520553331 in words is "five hundred twenty million, five hundred fifty-three thousand, three hundred thirty-one".