521404230 has 16 divisors (see below), whose sum is σ = 1251370224. Its totient is φ = 139041120.

The previous prime is 521404217. The next prime is 521404241. The reversal of 521404230 is 32404125.

It is a junction number, because it is equal to n+sod(n) for n = 521404197 and 521404206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8690041 + ... + 8690100.

It is an arithmetic number, because the mean of its divisors is an integer number (78210639).

Almost surely, 2^521404230 is an apocalyptic number.

521404230 is an abundant number, since it is smaller than the sum of its proper divisors (729965994).

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

521404230 is a wasteful number, since it uses less digits than its factorization.

521404230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17380151.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 521404230 is about 22834.2775230573. The cubic root of 521404230 is about 804.8683503190.

Adding to 521404230 its reverse (32404125), we get a palindrome (553808355).

The spelling of 521404230 in words is "five hundred twenty-one million, four hundred four thousand, two hundred thirty".