51051105155 has 4 divisors (see below), whose sum is σ = 61261326192. Its totient is φ = 40840884120.

The previous prime is 51051105151. The next prime is 51051105181. The reversal of 51051105155 is 55150115015.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51051105155 - 2² = 51051105151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51051105151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5105110511 + ... + 5105110520.

It is an arithmetic number, because the mean of its divisors is an integer number (15315331548).

Almost surely, 2^51051105155 is an apocalyptic number.

51051105155 is a deficient number, since it is larger than the sum of its proper divisors (10210221037).

51051105155 is a wasteful number, since it uses less digits than its factorization.

51051105155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10210221036.

The product of its (nonzero) digits is 3125, while the sum is 29.

The spelling of 51051105155 in words is "fifty-one billion, fifty-one million, one hundred five thousand, one hundred fifty-five".