505212153343 has 4 divisors (see below), whose sum is σ = 507829833088. Its totient is φ = 502594473600.

The previous prime is 505212153169. The next prime is 505212153401. The reversal of 505212153343 is 343351212505.

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-505212153343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 505212153299 and 505212153308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505212153143) 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, 1308839583 + ... + 1308839968.

It is an arithmetic number, because the mean of its divisors is an integer number (126957458272).

Almost surely, 2^505212153343 is an apocalyptic number.

505212153343 is a deficient number, since it is larger than the sum of its proper divisors (2617679745).

505212153343 is a wasteful number, since it uses less digits than its factorization.

505212153343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2617679744.

The product of its (nonzero) digits is 54000, while the sum is 34.

Adding to 505212153343 its reverse (343351212505), we get a palindrome (848563365848).

The spelling of 505212153343 in words is "five hundred five billion, two hundred twelve million, one hundred fifty-three thousand, three hundred forty-three".