505444213051 has 4 divisors (see below), whose sum is σ = 510654978232. Its totient is φ = 500233447872.

The previous prime is 505444213037. The next prime is 505444213063. The reversal of 505444213051 is 150312444505.

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-505444213051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 505444212998 and 505444213016.

It is not an unprimeable number, because it can be changed into a prime (505444217051) 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, 2605382445 + ... + 2605382638.

It is an arithmetic number, because the mean of its divisors is an integer number (127663744558).

Almost surely, 2^505444213051 is an apocalyptic number.

505444213051 is a deficient number, since it is larger than the sum of its proper divisors (5210765181).

505444213051 is an equidigital number, since it uses as much as digits as its factorization.

505444213051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5210765180.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 505444213051 its reverse (150312444505), we get a palindrome (655756657556).

The spelling of 505444213051 in words is "five hundred five billion, four hundred forty-four million, two hundred thirteen thousand, fifty-one".