51111342005 has 8 divisors (see below), whose sum is σ = 61672471224. Its totient is φ = 40663166400.

The previous prime is 51111341971. The next prime is 51111342011. The reversal of 51111342005 is 50024311115.

It can be written as a sum of positive squares in 4 ways, for example, as 1204228804 + 49907113201 = 34702^2 + 223399^2 .

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

It is not a de Polignac number, because 51111342005 - 2²⁴ = 51094564789 is a prime.

It is a super-2 number, since 2×51111342005² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28237406 + ... + 28239215.

It is an arithmetic number, because the mean of its divisors is an integer number (7709058903).

Almost surely, 2^51111342005 is an apocalyptic number.

It is an amenable number.

51111342005 is a deficient number, since it is larger than the sum of its proper divisors (10561129219).

51111342005 is a wasteful number, since it uses less digits than its factorization.

51111342005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56476807.

The product of its (nonzero) digits is 600, while the sum is 23.

The spelling of 51111342005 in words is "fifty-one billion, one hundred eleven million, three hundred forty-two thousand, five".