51111110111 has 8 divisors (see below), whose sum is σ = 52136555904. Its totient is φ = 50091714720.

The previous prime is 51111110087. The next prime is 51111110119. The reversal of 51111110111 is 11101111115.

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

It is a cyclic number.

It is not a de Polignac number, because 51111110111 - 2⁶ = 51111110047 is a prime.

It is a super-2 number, since 2×51111110111² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51111110119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1495535 + ... + 1529328.

It is an arithmetic number, because the mean of its divisors is an integer number (6517069488).

Almost surely, 2^51111110111 is an apocalyptic number.

51111110111 is a deficient number, since it is larger than the sum of its proper divisors (1025445793).

51111110111 is a wasteful number, since it uses less digits than its factorization.

51111110111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025201.

The product of its (nonzero) digits is 5, while the sum is 14.

Adding to 51111110111 its reverse (11101111115), we get a palindrome (62212221226).

The spelling of 51111110111 in words is "fifty-one billion, one hundred eleven million, one hundred ten thousand, one hundred eleven".