520531023 has 8 divisors (see below), whose sum is σ = 695259136. Its totient is φ = 346411800.

The previous prime is 520531021. The next prime is 520531027. The reversal of 520531023 is 320135025.

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

It is not a de Polignac number, because 520531023 - 2¹ = 520531021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520531021) 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, 150223 + ... + 153648.

It is an arithmetic number, because the mean of its divisors is an integer number (86907392).

Almost surely, 2^520531023 is an apocalyptic number.

520531023 is a deficient number, since it is larger than the sum of its proper divisors (174728113).

520531023 is a wasteful number, since it uses less digits than its factorization.

520531023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304445.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 520531023 is about 22815.1489804472. The cubic root of 520531023 is about 804.4187890871.

Adding to 520531023 its reverse (320135025), we get a palindrome (840666048).

The spelling of 520531023 in words is "five hundred twenty million, five hundred thirty-one thousand, twenty-three".