521204214 has 8 divisors (see below), whose sum is σ = 1042408440. Its totient is φ = 173734736.

The previous prime is 521204179. The next prime is 521204221. The reversal of 521204214 is 412402125.

It is a sphenic number, since it is the product of 3 distinct primes.

521204214 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 43433679 + ... + 43433690.

It is an arithmetic number, because the mean of its divisors is an integer number (130301055).

Almost surely, 2^521204214 is an apocalyptic number.

521204214 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

521204214 is a wasteful number, since it uses less digits than its factorization.

521204214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86867374.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 521204214 is about 22829.8973716484. The cubic root of 521204214 is about 804.7654185766.

Adding to 521204214 its reverse (412402125), we get a palindrome (933606339).

The spelling of 521204214 in words is "five hundred twenty-one million, two hundred four thousand, two hundred fourteen".