521714856 has 64 divisors (see below), whose sum is σ = 1408075200. Its totient is φ = 160132608.

The previous prime is 521714833. The next prime is 521714861. The reversal of 521714856 is 658417125.

It is a super-2 number, since 2×521714856² = 544372781942201472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140755 + ... + 144413.

It is an arithmetic number, because the mean of its divisors is an integer number (22001175).

Almost surely, 2^521714856 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 521714856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (704037600).

521714856 is an abundant number, since it is smaller than the sum of its proper divisors (886360344).

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

521714856 is a wasteful number, since it uses less digits than its factorization.

521714856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138 (or 4134 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The square root of 521714856 is about 22841.0782582609. The cubic root of 521714856 is about 805.0281517359.

The spelling of 521714856 in words is "five hundred twenty-one million, seven hundred fourteen thousand, eight hundred fifty-six".