503520343 has 4 divisors (see below), whose sum is σ = 511035640. Its totient is φ = 496005048.

The previous prime is 503520323. The next prime is 503520373. The reversal of 503520343 is 343025305.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 503520343 - 2¹³ = 503512151 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 (503520323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3757548 + ... + 3757681.

It is an arithmetic number, because the mean of its divisors is an integer number (127758910).

Almost surely, 2^503520343 is an apocalyptic number.

503520343 is a deficient number, since it is larger than the sum of its proper divisors (7515297).

503520343 is an equidigital number, since it uses as much as digits as its factorization.

503520343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7515296.

The product of its (nonzero) digits is 5400, while the sum is 25.

The square root of 503520343 is about 22439.2589672654. The cubic root of 503520343 is about 795.5589034272.

Adding to 503520343 its reverse (343025305), we get a palindrome (846545648).

The spelling of 503520343 in words is "five hundred three million, five hundred twenty thousand, three hundred forty-three".