520213512 has 128 divisors (see below), whose sum is σ = 1607880960. Its totient is φ = 136581120.

The previous prime is 520213487. The next prime is 520213543. The reversal of 520213512 is 215312025.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 683212 + ... + 683972.

It is an arithmetic number, because the mean of its divisors is an integer number (12561570).

Almost surely, 2^520213512 is an apocalyptic number.

520213512 is a gapful number since it is divisible by the number (52) 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 520213512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (803940480).

520213512 is an abundant number, since it is smaller than the sum of its proper divisors (1087667448).

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

520213512 is a wasteful number, since it uses less digits than its factorization.

520213512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103 (or 1099 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 520213512 is about 22808.1895818147. The cubic root of 520213512 is about 804.2551973240.

Adding to 520213512 its reverse (215312025), we get a palindrome (735525537).

The spelling of 520213512 in words is "five hundred twenty million, two hundred thirteen thousand, five hundred twelve".