505440234345223 has 4 divisors (see below), whose sum is σ = 532042351942360. Its totient is φ = 478838116748088.

The previous prime is 505440234345187. The next prime is 505440234345239. The reversal of 505440234345223 is 322543432044505.

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 505440234345223 - 2⁹ = 505440234344711 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 (505440234355223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13301058798540 + ... + 13301058798577.

It is an arithmetic number, because the mean of its divisors is an integer number (133010587985590).

Almost surely, 2^{505440234345223} is an apocalyptic number.

505440234345223 is a deficient number, since it is larger than the sum of its proper divisors (26602117597137).

505440234345223 is a wasteful number, since it uses less digits than its factorization.

505440234345223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26602117597136.

The product of its (nonzero) digits is 6912000, while the sum is 46.

Adding to 505440234345223 its reverse (322543432044505), we get a palindrome (827983666389728).

The spelling of 505440234345223 in words is "five hundred five trillion, four hundred forty billion, two hundred thirty-four million, three hundred forty-five thousand, two hundred twenty-three".