521343 has 8 divisors (see below), whose sum is σ = 772400. Its totient is φ = 347544.

The previous prime is 521329. The next prime is 521357. The reversal of 521343 is 343125.

It is an interprime number because it is at equal distance from previous prime (521329) and next prime (521357).

It is a de Polignac number, because none of the positive numbers 2^k-521343 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 (521363) 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, 9628 + ... + 9681.

It is an arithmetic number, because the mean of its divisors is an integer number (96550).

2⁵²¹³⁴³ is an apocalyptic number.

521343 is a deficient number, since it is larger than the sum of its proper divisors (251057).

521343 is a wasteful number, since it uses less digits than its factorization.

521343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19318 (or 19312 counting only the distinct ones).

The product of its digits is 360, while the sum is 18.

The square root of 521343 is about 722.0408575697. The cubic root of 521343 is about 80.4836843083.

Adding to 521343 its reverse (343125), we get a palindrome (864468).

The spelling of 521343 in words is "five hundred twenty-one thousand, three hundred forty-three".