521043040 has 192 divisors, whose sum is σ = 1490227200. Its totient is φ = 168376320.

The previous prime is 521043037. The next prime is 521043059. The reversal of 521043040 is 40340125.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 521042999 and 521043017.

It is a congruent number.

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, 1492786 + ... + 1493134.

It is an arithmetic number, because the mean of its divisors is an integer number (7761600).

Almost surely, 2^521043040 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 521043040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (745113600).

521043040 is an abundant number, since it is smaller than the sum of its proper divisors (969184160).

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

521043040 is a wasteful number, since it uses less digits than its factorization.

521043040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 521043040 is about 22826.3672098738. The cubic root of 521043040 is about 804.6824564475.

Adding to 521043040 its reverse (40340125), we get a palindrome (561383165).

The spelling of 521043040 in words is "five hundred twenty-one million, forty-three thousand, forty".