520531000 has 128 divisors (see below), whose sum is σ = 1347840000. Its totient is φ = 186576000.

The previous prime is 520530979. The next prime is 520531001. The reversal of 520531000 is 135025.

It is a super-2 number, since 2×520531000² = 541905043922000000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520531001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 868701 + ... + 869299.

It is an arithmetic number, because the mean of its divisors is an integer number (10530000).

Almost surely, 2^520531000 is an apocalyptic number.

520531000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520531000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (673920000).

520531000 is an abundant number, since it is smaller than the sum of its proper divisors (827309000).

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

520531000 is a wasteful number, since it uses less digits than its factorization.

520531000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710 (or 696 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 520531000 is about 22815.1484763961. The cubic root of 520531000 is about 804.4187772392.

Adding to 520531000 its reverse (135025), we get a palindrome (520666025).

The spelling of 520531000 in words is "five hundred twenty million, five hundred thirty-one thousand".