520231240 has 32 divisors (see below), whose sum is σ = 1178285760. Its totient is φ = 206712000.

The previous prime is 520231189. The next prime is 520231249. The reversal of 520231240 is 42132025.

It is not an unprimeable number, because it can be changed into a prime (520231249) 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, 37026 + ... + 49105.

It is an arithmetic number, because the mean of its divisors is an integer number (36821430).

Almost surely, 2^520231240 is an apocalyptic number.

It is an amenable number.

520231240 is an abundant number, since it is smaller than the sum of its proper divisors (658054520).

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

520231240 is a wasteful number, since it uses less digits than its factorization.

520231240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86293 (or 86289 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 520231240 is about 22808.5782108399. The cubic root of 520231240 is about 804.2643331076.

Adding to 520231240 its reverse (42132025), we get a palindrome (562363265).

The spelling of 520231240 in words is "five hundred twenty million, two hundred thirty-one thousand, two hundred forty".