521254341323 has 12 divisors (see below), whose sum is σ = 550186616160. Its totient is φ = 493771504176.

The previous prime is 521254341211. The next prime is 521254341331. The reversal of 521254341323 is 323143452125.

It is a de Polignac number, because none of the positive numbers 2^k-521254341323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521254341823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3930686 + ... + 4061132.

It is an arithmetic number, because the mean of its divisors is an integer number (45848884680).

Almost surely, 2^521254341323 is an apocalyptic number.

521254341323 is a deficient number, since it is larger than the sum of its proper divisors (28932274837).

521254341323 is a wasteful number, since it uses less digits than its factorization.

521254341323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141554 (or 141535 counting only the distinct ones).

The product of its digits is 86400, while the sum is 35.

Adding to 521254341323 its reverse (323143452125), we get a palindrome (844397793448).

The spelling of 521254341323 in words is "five hundred twenty-one billion, two hundred fifty-four million, three hundred forty-one thousand, three hundred twenty-three".