51111050055 has 64 divisors (see below), whose sum is σ = 90570493440. Its totient is φ = 24456347136.

The previous prime is 51111050033. The next prime is 51111050077. The reversal of 51111050055 is 55005011115.

It is an interprime number because it is at equal distance from previous prime (51111050033) and next prime (51111050077).

It is not a de Polignac number, because 51111050055 - 2⁶ = 51111049991 is a prime.

It is a super-2 number, since 2×51111050055² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1082736 + ... + 1128954.

It is an arithmetic number, because the mean of its divisors is an integer number (1415163960).

Almost surely, 2^51111050055 is an apocalyptic number.

51111050055 is a deficient number, since it is larger than the sum of its proper divisors (39459443385).

51111050055 is a wasteful number, since it uses less digits than its factorization.

51111050055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46400.

The product of its (nonzero) digits is 625, while the sum is 24.

It can be divided in two parts, 511110 and 50055, that added together give a palindrome (561165).

The spelling of 51111050055 in words is "fifty-one billion, one hundred eleven million, fifty thousand, fifty-five".