505351521223 has 4 divisors (see below), whose sum is σ = 505364030640. Its totient is φ = 505339011808.

The previous prime is 505351521197. The next prime is 505351521277. The reversal of 505351521223 is 322125153505.

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 505351521223 - 2⁹ = 505351520711 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 (505351522223) 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, 6193915 + ... + 6274972.

It is an arithmetic number, because the mean of its divisors is an integer number (126341007660).

Almost surely, 2^505351521223 is an apocalyptic number.

505351521223 is a deficient number, since it is larger than the sum of its proper divisors (12509417).

505351521223 is a wasteful number, since it uses less digits than its factorization.

505351521223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12509416.

The product of its (nonzero) digits is 45000, while the sum is 34.

Adding to 505351521223 its reverse (322125153505), we get a palindrome (827476674728).

The spelling of 505351521223 in words is "five hundred five billion, three hundred fifty-one million, five hundred twenty-one thousand, two hundred twenty-three".