520213540 has 192 divisors, whose sum is σ = 1497968640. Its totient is φ = 146741760.

The previous prime is 520213487. The next prime is 520213543. The reversal of 520213540 is 45312025.

520213540 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (520213543) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 672594 + ... + 673366.

It is an arithmetic number, because the mean of its divisors is an integer number (7801920).

Almost surely, 2^520213540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520213540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (748984320).

520213540 is an abundant number, since it is smaller than the sum of its proper divisors (977755100).

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

520213540 is a wasteful number, since it uses less digits than its factorization.

520213540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842 (or 840 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 520213540 is about 22808.1901956293. The cubic root of 520213540 is about 804.2552117535.

Adding to 520213540 its reverse (45312025), we get a palindrome (565525565).

The spelling of 520213540 in words is "five hundred twenty million, two hundred thirteen thousand, five hundred forty".