51320322651 has 16 divisors (see below), whose sum is σ = 73697899520. Its totient is φ = 31578660000.

The previous prime is 51320322637. The next prime is 51320322679. The reversal of 51320322651 is 15622302315.

It is not a de Polignac number, because 51320322651 - 2⁹ = 51320322139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51320322601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 380310 + ... + 497268.

It is an arithmetic number, because the mean of its divisors is an integer number (4606118720).

Almost surely, 2^51320322651 is an apocalyptic number.

51320322651 is a deficient number, since it is larger than the sum of its proper divisors (22377576869).

51320322651 is a wasteful number, since it uses less digits than its factorization.

51320322651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128226.

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 51320322651 its reverse (15622302315), we get a palindrome (66942624966).

The spelling of 51320322651 in words is "fifty-one billion, three hundred twenty million, three hundred twenty-two thousand, six hundred fifty-one".