521125696 has 84 divisors (see below), whose sum is σ = 1279928352. Its totient is φ = 206129664.

The previous prime is 521125691. The next prime is 521125699. The reversal of 521125696 is 696521125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521125691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72271 + ... + 79153.

Almost surely, 2^521125696 is an apocalyptic number.

521125696 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 521125696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (639964176).

521125696 is an abundant number, since it is smaller than the sum of its proper divisors (758802656).

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

521125696 is a wasteful number, since it uses less digits than its factorization.

521125696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6928 (or 6905 counting only the distinct ones).

The product of its digits is 32400, while the sum is 37.

The square root of 521125696 is about 22828.1776758461. The cubic root of 521125696 is about 804.7250046385.

The spelling of 521125696 in words is "five hundred twenty-one million, one hundred twenty-five thousand, six hundred ninety-six".