505140323 has 4 divisors (see below), whose sum is σ = 508996488. Its totient is φ = 501284160.

The previous prime is 505140313. The next prime is 505140331. The reversal of 505140323 is 323041505.

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 505140323 - 2¹⁴ = 505123939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505140313) 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, 1927886 + ... + 1928147.

It is an arithmetic number, because the mean of its divisors is an integer number (127249122).

Almost surely, 2^505140323 is an apocalyptic number.

505140323 is a deficient number, since it is larger than the sum of its proper divisors (3856165).

505140323 is a wasteful number, since it uses less digits than its factorization.

505140323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3856164.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 505140323 is about 22475.3269831609. The cubic root of 505140323 is about 796.4111760653.

Adding to 505140323 its reverse (323041505), we get a palindrome (828181828).

The spelling of 505140323 in words is "five hundred five million, one hundred forty thousand, three hundred twenty-three".