51231505055 has 8 divisors (see below), whose sum is σ = 61479194400. Its totient is φ = 40984278496.

The previous prime is 51231505049. The next prime is 51231505097. The reversal of 51231505055 is 55050513215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51231505055 is a prime.

It is a super-2 number, since 2×51231505055² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212486 + ... + 384204.

It is an arithmetic number, because the mean of its divisors is an integer number (7684899300).

Almost surely, 2^51231505055 is an apocalyptic number.

51231505055 is a deficient number, since it is larger than the sum of its proper divisors (10247689345).

51231505055 is a wasteful number, since it uses less digits than its factorization.

51231505055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231393.

The product of its (nonzero) digits is 18750, while the sum is 32.

The spelling of 51231505055 in words is "fifty-one billion, two hundred thirty-one million, five hundred five thousand, fifty-five".