520431523 has 8 divisors (see below), whose sum is σ = 551558592. Its totient is φ = 489361536.

The previous prime is 520431473. The next prime is 520431533. The reversal of 520431523 is 325134025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520431523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520431533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5286 + ... + 32692.

It is an arithmetic number, because the mean of its divisors is an integer number (68944824).

Almost surely, 2^520431523 is an apocalyptic number.

520431523 is a deficient number, since it is larger than the sum of its proper divisors (31127069).

520431523 is a wasteful number, since it uses less digits than its factorization.

520431523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28541.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 520431523 is about 22812.9683075219. The cubic root of 520431523 is about 804.3675306821.

Adding to 520431523 its reverse (325134025), we get a palindrome (845565548).

The spelling of 520431523 in words is "five hundred twenty million, four hundred thirty-one thousand, five hundred twenty-three".