520144212 has 72 divisors (see below), whose sum is σ = 1420542144. Its totient is φ = 147694848.

The previous prime is 520144181. The next prime is 520144259. The reversal of 520144212 is 212441025.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95548 + ... + 100844.

It is an arithmetic number, because the mean of its divisors is an integer number (19729752).

Almost surely, 2^520144212 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 520144212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (710271072).

520144212 is an abundant number, since it is smaller than the sum of its proper divisors (900397932).

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

520144212 is a wasteful number, since it uses less digits than its factorization.

520144212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5485 (or 5476 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 520144212 is about 22806.6703400562. The cubic root of 520144212 is about 804.2194829113.

Adding to 520144212 its reverse (212441025), we get a palindrome (732585237).

The spelling of 520144212 in words is "five hundred twenty million, one hundred forty-four thousand, two hundred twelve".