51331200505 has 32 divisors (see below), whose sum is σ = 67887832320. Its totient is φ = 37029000960.

The previous prime is 51331200463. The next prime is 51331200509. The reversal of 51331200505 is 50500213315.

It is not a de Polignac number, because 51331200505 - 2²⁵ = 51297646073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51331200505.

It is not an unprimeable number, because it can be changed into a prime (51331200509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 452014 + ... + 554056.

It is an arithmetic number, because the mean of its divisors is an integer number (2121494760).

Almost surely, 2^51331200505 is an apocalyptic number.

It is an amenable number.

51331200505 is a deficient number, since it is larger than the sum of its proper divisors (16556631815).

51331200505 is a wasteful number, since it uses less digits than its factorization.

51331200505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102241.

The product of its (nonzero) digits is 2250, while the sum is 25.

The spelling of 51331200505 in words is "fifty-one billion, three hundred thirty-one million, two hundred thousand, five hundred five".