51155445215 has 16 divisors (see below), whose sum is σ = 70776894528. Its totient is φ = 34767591936.

The previous prime is 51155445197. The next prime is 51155445221. The reversal of 51155445215 is 51254455115.

It is not a de Polignac number, because 51155445215 - 2⁸ = 51155444959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6463232 + ... + 6471141.

It is an arithmetic number, because the mean of its divisors is an integer number (4423555908).

Almost surely, 2^51155445215 is an apocalyptic number.

51155445215 is a deficient number, since it is larger than the sum of its proper divisors (19621449313).

51155445215 is a wasteful number, since it uses less digits than its factorization.

51155445215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12934498.

The product of its digits is 100000, while the sum is 38.

The spelling of 51155445215 in words is "fifty-one billion, one hundred fifty-five million, four hundred forty-five thousand, two hundred fifteen".