505351440421223 has 4 divisors (see below), whose sum is σ = 551292480459528. Its totient is φ = 459410400382920.

The previous prime is 505351440421199. The next prime is 505351440421253. The reversal of 505351440421223 is 322124044153505.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505351440421223 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 (505351440421253) 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, 22970520019136 + ... + 22970520019157.

It is an arithmetic number, because the mean of its divisors is an integer number (137823120114882).

Almost surely, 2^{505351440421223} is an apocalyptic number.

505351440421223 is a deficient number, since it is larger than the sum of its proper divisors (45941040038305).

505351440421223 is a wasteful number, since it uses less digits than its factorization.

505351440421223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45941040038304.

The product of its (nonzero) digits is 576000, while the sum is 41.

Adding to 505351440421223 its reverse (322124044153505), we get a palindrome (827475484574728).

The spelling of 505351440421223 in words is "five hundred five trillion, three hundred fifty-one billion, four hundred forty million, four hundred twenty-one thousand, two hundred twenty-three".