51555121135 has 32 divisors (see below), whose sum is σ = 70939514880. Its totient is φ = 35234610432.

The previous prime is 51555121103. The next prime is 51555121141. The reversal of 51555121135 is 53112155515.

It is not a de Polignac number, because 51555121135 - 2⁵ = 51555121103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51555121135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21067482 + ... + 21069928.

It is an arithmetic number, because the mean of its divisors is an integer number (2216859840).

Almost surely, 2^51555121135 is an apocalyptic number.

51555121135 is a deficient number, since it is larger than the sum of its proper divisors (19384393745).

51555121135 is a wasteful number, since it uses less digits than its factorization.

51555121135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4215.

The product of its digits is 18750, while the sum is 34.

The spelling of 51555121135 in words is "fifty-one billion, five hundred fifty-five million, one hundred twenty-one thousand, one hundred thirty-five".