521104256 has 64 divisors (see below), whose sum is σ = 1060290000. Its totient is φ = 255062016.

The previous prime is 521104253. The next prime is 521104271. The reversal of 521104256 is 652401125.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521104253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1697255 + ... + 1697561.

Almost surely, 2^521104256 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 521104256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (530145000).

521104256 is an abundant number, since it is smaller than the sum of its proper divisors (539185744).

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

521104256 is a wasteful number, since it uses less digits than its factorization.

521104256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 521104256 is about 22827.7080759326. The cubic root of 521104256 is about 804.7139685674.

The spelling of 521104256 in words is "five hundred twenty-one million, one hundred four thousand, two hundred fifty-six".