520131340 has 24 divisors (see below), whose sum is σ = 1093070160. Its totient is φ = 207901248.

The previous prime is 520131329. The next prime is 520131341. The reversal of 520131340 is 43131025.

It is a super-2 number, since 2×520131340² = 541073221700391200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (520131341) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 21151 + ... + 38569.

It is an arithmetic number, because the mean of its divisors is an integer number (45544590).

Almost surely, 2^520131340 is an apocalyptic number.

It is an amenable number.

520131340 is an abundant number, since it is smaller than the sum of its proper divisors (572938820).

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

520131340 is a wasteful number, since it uses less digits than its factorization.

520131340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18921 (or 18919 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 520131340 is about 22806.3881401681. The cubic root of 520131340 is about 804.2128488546.

Adding to 520131340 its reverse (43131025), we get a palindrome (563262365).

The spelling of 520131340 in words is "five hundred twenty million, one hundred thirty-one thousand, three hundred forty".