520223144 has 32 divisors (see below), whose sum is σ = 1115961600. Its totient is φ = 222713280.

The previous prime is 520223107. The next prime is 520223149. The reversal of 520223144 is 441322025.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (520223149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53714 + ... + 62654.

It is an arithmetic number, because the mean of its divisors is an integer number (34873800).

Almost surely, 2^520223144 is an apocalyptic number.

It is an amenable number.

520223144 is an abundant number, since it is smaller than the sum of its proper divisors (595738456).

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

520223144 is a wasteful number, since it uses less digits than its factorization.

520223144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9993 (or 9989 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 520223144 is about 22808.4007330632. The cubic root of 520223144 is about 804.2601610156.

Adding to 520223144 its reverse (441322025), we get a palindrome (961545169).

The spelling of 520223144 in words is "five hundred twenty million, two hundred twenty-three thousand, one hundred forty-four".