520523144 has 8 divisors (see below), whose sum is σ = 975980910. Its totient is φ = 260261568.

The previous prime is 520523111. The next prime is 520523147. The reversal of 520523144 is 441325025.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 480048100 + 40475044 = 21910^2 + 6362^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (520523147) by changing a digit.

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 as a sum of consecutive naturals, namely, 32532689 + ... + 32532704.

Almost surely, 2^520523144 is an apocalyptic number.

It is an amenable number.

520523144 is a deficient number, since it is larger than the sum of its proper divisors (455457766).

520523144 is a wasteful number, since it uses less digits than its factorization.

520523144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65065399 (or 65065395 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 520523144 is about 22814.9763094332. The cubic root of 520523144 is about 804.4147303808.

Adding to 520523144 its reverse (441325025), we get a palindrome (961848169).

The spelling of 520523144 in words is "five hundred twenty million, five hundred twenty-three thousand, one hundred forty-four".