521343413 has 8 divisors (see below), whose sum is σ = 562168320. Its totient is φ = 481857120.

The previous prime is 521343391. The next prime is 521343419. The reversal of 521343413 is 314343125.

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

It is a cyclic number.

It is not a de Polignac number, because 521343413 - 2¹⁴ = 521327029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521343419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333845 + ... + 335402.

It is an arithmetic number, because the mean of its divisors is an integer number (70271040).

Almost surely, 2^521343413 is an apocalyptic number.

It is an amenable number.

521343413 is a deficient number, since it is larger than the sum of its proper divisors (40824907).

521343413 is a wasteful number, since it uses less digits than its factorization.

521343413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669307.

The product of its digits is 4320, while the sum is 26.

The square root of 521343413 is about 22832.9457801660. The cubic root of 521343413 is about 804.8370556095.

Adding to 521343413 its reverse (314343125), we get a palindrome (835686538).

The spelling of 521343413 in words is "five hundred twenty-one million, three hundred forty-three thousand, four hundred thirteen".