520554104512423 has 4 divisors (see below), whose sum is σ = 520554156946200. Its totient is φ = 520554052078648.

The previous prime is 520554104512373. The next prime is 520554104512459. The reversal of 520554104512423 is 324215401455025.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 520554104512423 - 2⁴¹ = 518355081256871 is a prime.

It is a super-2 number, since 2×520554104512423² (a number of 30 digits) contains 22 as substring.

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 520554104512423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520554104516423) 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, 6262540 + ... + 32868337.

It is an arithmetic number, because the mean of its divisors is an integer number (130138539236550).

Almost surely, 2^{520554104512423} is an apocalyptic number.

520554104512423 is a deficient number, since it is larger than the sum of its proper divisors (52433777).

520554104512423 is a wasteful number, since it uses less digits than its factorization.

520554104512423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52433776.

The product of its (nonzero) digits is 960000, while the sum is 43.

Adding to 520554104512423 its reverse (324215401455025), we get a palindrome (844769505967448).

The spelling of 520554104512423 in words is "five hundred twenty trillion, five hundred fifty-four billion, one hundred four million, five hundred twelve thousand, four hundred twenty-three".