505406243212 has 24 divisors (see below), whose sum is σ = 953152965072. Its totient is φ = 233103624000.

The previous prime is 505406243197. The next prime is 505406243227. The reversal of 505406243212 is 212342604505.

It is an interprime number because it is at equal distance from previous prime (505406243197) and next prime (505406243227).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3273739 + ... + 3424642.

It is an arithmetic number, because the mean of its divisors is an integer number (39714706878).

Almost surely, 2^505406243212 is an apocalyptic number.

505406243212 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

505406243212 is a deficient number, since it is larger than the sum of its proper divisors (447746721860).

505406243212 is a wasteful number, since it uses less digits than its factorization.

505406243212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6699849 (or 6699847 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 505406243212 its reverse (212342604505), we get a palindrome (717748847717).

The spelling of 505406243212 in words is "five hundred five billion, four hundred six million, two hundred forty-three thousand, two hundred twelve".