505405304243 has 8 divisors (see below), whose sum is σ = 611582889312. Its totient is φ = 407721926016.

The previous prime is 505405304233. The next prime is 505405304267. The reversal of 505405304243 is 342403504505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 505405304243 - 2²⁰ = 505404255667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505405304233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2123551580 + ... + 2123551817.

It is an arithmetic number, because the mean of its divisors is an integer number (76447861164).

Almost surely, 2^505405304243 is an apocalyptic number.

505405304243 is a deficient number, since it is larger than the sum of its proper divisors (106177585069).

505405304243 is a wasteful number, since it uses less digits than its factorization.

505405304243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4247103421.

The product of its (nonzero) digits is 144000, while the sum is 35.

Adding to 505405304243 its reverse (342403504505), we get a palindrome (847808808748).

The spelling of 505405304243 in words is "five hundred five billion, four hundred five million, three hundred four thousand, two hundred forty-three".