521116160 has 80 divisors (see below), whose sum is σ = 1255982112. Its totient is φ = 207360000.

The previous prime is 521116157. The next prime is 521116163. The reversal of 521116160 is 61611125.

It is an interprime number because it is at equal distance from previous prime (521116157) and next prime (521116163).

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (521116163) 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 in 7 ways as a sum of consecutive naturals, for example, 642155 + ... + 642965.

Almost surely, 2^521116160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521116160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (627991056).

521116160 is an abundant number, since it is smaller than the sum of its proper divisors (734865952).

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

521116160 is an equidigital number, since it uses as much as digits as its factorization.

521116160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085 (or 1069 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 521116160 is about 22827.9688102117. The cubic root of 521116160 is about 804.7200960950.

Adding to 521116160 its reverse (61611125), we get a palindrome (582727285).

The spelling of 521116160 in words is "five hundred twenty-one million, one hundred sixteen thousand, one hundred sixty".