51503230505 has 16 divisors (see below), whose sum is σ = 63192579840. Its totient is φ = 40278830592.

The previous prime is 51503230501. The next prime is 51503230529. The reversal of 51503230505 is 50503230515.

It is a cyclic number.

It is not a de Polignac number, because 51503230505 - 2² = 51503230501 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51503230501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74297 + ... + 329433.

It is an arithmetic number, because the mean of its divisors is an integer number (3949536240).

Almost surely, 2^51503230505 is an apocalyptic number.

It is an amenable number.

51503230505 is a deficient number, since it is larger than the sum of its proper divisors (11689349335).

51503230505 is a wasteful number, since it uses less digits than its factorization.

51503230505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256048.

The product of its (nonzero) digits is 11250, while the sum is 29.

The spelling of 51503230505 in words is "fifty-one billion, five hundred three million, two hundred thirty thousand, five hundred five".