521013343 has 8 divisors (see below), whose sum is σ = 524596176. Its totient is φ = 517440000.

The previous prime is 521013299. The next prime is 521013349. The reversal of 521013343 is 343310125.

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 521013343 - 2¹³ = 521005151 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 (521013349) 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, 133368 + ... + 137218.

It is an arithmetic number, because the mean of its divisors is an integer number (65574522).

Almost surely, 2^521013343 is an apocalyptic number.

521013343 is a deficient number, since it is larger than the sum of its proper divisors (3582833).

521013343 is a wasteful number, since it uses less digits than its factorization.

521013343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4745.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 521013343 is about 22825.7167028770. The cubic root of 521013343 is about 804.6671684533.

Adding to 521013343 its reverse (343310125), we get a palindrome (864323468).

The spelling of 521013343 in words is "five hundred twenty-one million, thirteen thousand, three hundred forty-three".