51206403665315 has 16 divisors (see below), whose sum is σ = 62654560419936. Its totient is φ = 40164830035200.

The previous prime is 51206403665311. The next prime is 51206403665317. The reversal of 51206403665315 is 51356630460215.

It is not a de Polignac number, because 51206403665315 - 2² = 51206403665311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51206403665315.

It is not an unprimeable number, because it can be changed into a prime (51206403665311) 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, 268099181 + ... + 268290110.

It is an arithmetic number, because the mean of its divisors is an integer number (3915910026246).

Almost surely, 2^{51206403665315} is an apocalyptic number.

51206403665315 is a deficient number, since it is larger than the sum of its proper divisors (11448156754621).

51206403665315 is a wasteful number, since it uses less digits than its factorization.

51206403665315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536389670.

The product of its (nonzero) digits is 1944000, while the sum is 47.

The spelling of 51206403665315 in words is "fifty-one trillion, two hundred six billion, four hundred three million, six hundred sixty-five thousand, three hundred fifteen".