521340160 has 144 divisors (see below), whose sum is σ = 1386911232. Its totient is φ = 186163200.

The previous prime is 521340151. The next prime is 521340161. The reversal of 521340160 is 61043125.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521340161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 858577 + ... + 859183.

It is an arithmetic number, because the mean of its divisors is an integer number (9631328).

Almost surely, 2^521340160 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 521340160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (693455616).

521340160 is an abundant number, since it is smaller than the sum of its proper divisors (865571072).

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

521340160 is a wasteful number, since it uses less digits than its factorization.

521340160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 521340160 is about 22832.8745452692. The cubic root of 521340160 is about 804.8353816390.

Adding to 521340160 its reverse (61043125), we get a palindrome (582383285).

The spelling of 521340160 in words is "five hundred twenty-one million, three hundred forty thousand, one hundred sixty".