521234224 has 80 divisors (see below), whose sum is σ = 1183906368. Its totient is φ = 217691136.

The previous prime is 521234213. The next prime is 521234227. The reversal of 521234224 is 422432125.

It is not an unprimeable number, because it can be changed into a prime (521234227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1644114 + ... + 1644430.

Almost surely, 2^521234224 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 521234224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (591953184).

521234224 is an abundant number, since it is smaller than the sum of its proper divisors (662672144).

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

521234224 is a wasteful number, since it uses less digits than its factorization.

521234224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 656 counting only the distinct ones).

The product of its digits is 3840, while the sum is 25.

The square root of 521234224 is about 22830.5546143759. The cubic root of 521234224 is about 804.7808639280.

Adding to 521234224 its reverse (422432125), we get a palindrome (943666349).

The spelling of 521234224 in words is "five hundred twenty-one million, two hundred thirty-four thousand, two hundred twenty-four".