51127131811 has 4 divisors (see below), whose sum is σ = 58431007792. Its totient is φ = 43823255832.

The previous prime is 51127131799. The next prime is 51127131823. The reversal of 51127131811 is 11813172115.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (51127131799) and next prime (51127131823).

It is a cyclic number.

It is not a de Polignac number, because 51127131811 - 2⁷ = 51127131683 is a prime.

It is a super-2 number, since 2×51127131811² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51127135811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3651937980 + ... + 3651937993.

It is an arithmetic number, because the mean of its divisors is an integer number (14607751948).

Almost surely, 2^51127131811 is an apocalyptic number.

51127131811 is a deficient number, since it is larger than the sum of its proper divisors (7303875981).

51127131811 is an equidigital number, since it uses as much as digits as its factorization.

51127131811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7303875980.

The product of its digits is 1680, while the sum is 31.

The spelling of 51127131811 in words is "fifty-one billion, one hundred twenty-seven million, one hundred thirty-one thousand, eight hundred eleven".