520279531 has 4 divisors (see below), whose sum is σ = 520403832. Its totient is φ = 520155232.

The previous prime is 520279511. The next prime is 520279567. The reversal of 520279531 is 135972025.

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

It is a cyclic number.

It is not a de Polignac number, because 520279531 - 2⁵ = 520279499 is a prime.

It is a super-2 number, since 2×520279531² = 541381580755159922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520279511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55645 + ... + 64318.

It is an arithmetic number, because the mean of its divisors is an integer number (130100958).

Almost surely, 2^520279531 is an apocalyptic number.

520279531 is a deficient number, since it is larger than the sum of its proper divisors (124301).

520279531 is a wasteful number, since it uses less digits than its factorization.

520279531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124300.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 520279531 is about 22809.6368011417. The cubic root of 520279531 is about 804.2892178923.

The spelling of 520279531 in words is "five hundred twenty million, two hundred seventy-nine thousand, five hundred thirty-one".