521080056 has 192 divisors, whose sum is σ = 1737478080. Its totient is φ = 137687040.

The previous prime is 521080051. The next prime is 521080057. The reversal of 521080056 is 650080125.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521080051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 522150 + ... + 523146.

It is an arithmetic number, because the mean of its divisors is an integer number (9049365).

Almost surely, 2^521080056 is an apocalyptic number.

521080056 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521080056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (868739040).

521080056 is an abundant number, since it is smaller than the sum of its proper divisors (1216398024).

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

521080056 is a wasteful number, since it uses less digits than its factorization.

521080056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094 (or 1087 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 521080056 is about 22827.1780121854. The cubic root of 521080056 is about 804.7015114443.

The spelling of 521080056 in words is "five hundred twenty-one million, eighty thousand, fifty-six".