521103043 has 4 divisors (see below), whose sum is σ = 521268048. Its totient is φ = 520938040.

The previous prime is 521103031. The next prime is 521103047. The reversal of 521103043 is 340301125.

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 521103043 - 2¹³ = 521094851 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 521103043.

It is not an unprimeable number, because it can be changed into a prime (521103047) by changing a digit.

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, 77671 + ... + 84112.

It is an arithmetic number, because the mean of its divisors is an integer number (130317012).

Almost surely, 2^521103043 is an apocalyptic number.

521103043 is a deficient number, since it is larger than the sum of its proper divisors (165005).

521103043 is a wasteful number, since it uses less digits than its factorization.

521103043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165004.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 521103043 is about 22827.6815073279. The cubic root of 521103043 is about 804.7133441761.

Adding to 521103043 its reverse (340301125), we get a palindrome (861404168).

The spelling of 521103043 in words is "five hundred twenty-one million, one hundred three thousand, forty-three".