521313044 has 12 divisors (see below), whose sum is σ = 1042626144. Its totient is φ = 223419864.

The previous prime is 521313043. The next prime is 521313047. The reversal of 521313044 is 440313125.

521313044 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521313043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9309134 + ... + 9309189.

It is an arithmetic number, because the mean of its divisors is an integer number (86885512).

Almost surely, 2^521313044 is an apocalyptic number.

It is an amenable number.

521313044 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

521313044 is a wasteful number, since it uses less digits than its factorization.

521313044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18618334 (or 18618332 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 521313044 is about 22832.2807445949. The cubic root of 521313044 is about 804.8214276692.

Adding to 521313044 its reverse (440313125), we get a palindrome (961626169).

The spelling of 521313044 in words is "five hundred twenty-one million, three hundred thirteen thousand, forty-four".