521115043323 has 16 divisors (see below), whose sum is σ = 794094158336. Its totient is φ = 297774740160.

The previous prime is 521115043321. The next prime is 521115043403. The reversal of 521115043323 is 323340511125.

It is not a de Polignac number, because 521115043323 - 2¹ = 521115043321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521115043321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1206183 + ... + 1580223.

It is an arithmetic number, because the mean of its divisors is an integer number (49630884896).

Almost surely, 2^521115043323 is an apocalyptic number.

521115043323 is a deficient number, since it is larger than the sum of its proper divisors (272979115013).

521115043323 is a wasteful number, since it uses less digits than its factorization.

521115043323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440394.

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 521115043323 its reverse (323340511125), we get a palindrome (844455554448).

The spelling of 521115043323 in words is "five hundred twenty-one billion, one hundred fifteen million, forty-three thousand, three hundred twenty-three".