51110111000 has 64 divisors (see below), whose sum is σ = 128797512480. Its totient is φ = 18871420800.

The previous prime is 51110110999. The next prime is 51110111047. The reversal of 51110111000 is 11101115.

It is a happy number.

It is a super-2 number, since 2×51110111000² (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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1952774 + ... + 1978773.

Almost surely, 2^51110111000 is an apocalyptic number.

51110111000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51110111000 is an abundant number, since it is smaller than the sum of its proper divisors (77687401480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51110111000 is a wasteful number, since it uses less digits than its factorization.

51110111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3931581 (or 3931567 counting only the distinct ones).

The product of its (nonzero) digits is 5, while the sum is 11.

Adding to 51110111000 its reverse (11101115), we get a palindrome (51121212115).

The spelling of 51110111000 in words is "fifty-one billion, one hundred ten million, one hundred eleven thousand".