520631144 has 32 divisors (see below), whose sum is σ = 1093716000. Its totient is φ = 230253120.

The previous prime is 520631131. The next prime is 520631201. The reversal of 520631144 is 441136025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76694 + ... + 83205.

It is an arithmetic number, because the mean of its divisors is an integer number (34178625).

Almost surely, 2^520631144 is an apocalyptic number.

It is an amenable number.

520631144 is an abundant number, since it is smaller than the sum of its proper divisors (573084856).

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

520631144 is a wasteful number, since it uses less digits than its factorization.

520631144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159953 (or 159949 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 520631144 is about 22817.3430530375. The cubic root of 520631144 is about 804.4703608134.

Adding to 520631144 its reverse (441136025), we get a palindrome (961767169).

The spelling of 520631144 in words is "five hundred twenty million, six hundred thirty-one thousand, one hundred forty-four".