521050040254240 has 192 divisors, whose sum is σ = 1420619399797248. Its totient is φ = 176902806528000.

The previous prime is 521050040254201. The next prime is 521050040254253. The reversal of 521050040254240 is 42452040050125.

It is a junction number, because it is equal to n+sod(n) for n = 521050040254196 and 521050040254205.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48751500 + ... + 58470580.

It is an arithmetic number, because the mean of its divisors is an integer number (7399059373944).

Almost surely, 2^{521050040254240} 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 521050040254240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (710309699898624).

521050040254240 is an abundant number, since it is smaller than the sum of its proper divisors (899569359543008).

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

521050040254240 is a wasteful number, since it uses less digits than its factorization.

521050040254240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9719571 (or 9719563 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 34.

The spelling of 521050040254240 in words is "five hundred twenty-one trillion, fifty billion, forty million, two hundred fifty-four thousand, two hundred forty".