51111531110 has 96 divisors (see below), whose sum is σ = 98186673312. Its totient is φ = 19143971840.

The previous prime is 51111530993. The next prime is 51111531131. The reversal of 51111531110 is 1113511115.

It is a super-2 number, since 2×51111531110² (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 47 ways as a sum of consecutive naturals, for example, 78271544 + ... + 78272196.

It is an arithmetic number, because the mean of its divisors is an integer number (1022777847).

Almost surely, 2^51111531110 is an apocalyptic number.

51111531110 is a deficient number, since it is larger than the sum of its proper divisors (47075142202).

51111531110 is a wasteful number, since it uses less digits than its factorization.

51111531110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986 (or 957 counting only the distinct ones).

The product of its (nonzero) digits is 75, while the sum is 20.

The spelling of 51111531110 in words is "fifty-one billion, one hundred eleven million, five hundred thirty-one thousand, one hundred ten".