51511105005 has 32 divisors (see below), whose sum is σ = 83277131520. Its totient is φ = 27186762240.

The previous prime is 51511105001. The next prime is 51511105013. The reversal of 51511105005 is 50050111515.

It is not a de Polignac number, because 51511105005 - 2² = 51511105001 is a prime.

It is a super-2 number, since 2×51511105005² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51511105001) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1326465 + ... + 1364745.

It is an arithmetic number, because the mean of its divisors is an integer number (2602410360).

Almost surely, 2^51511105005 is an apocalyptic number.

It is an amenable number.

51511105005 is a deficient number, since it is larger than the sum of its proper divisors (31766026515).

51511105005 is a wasteful number, since it uses less digits than its factorization.

51511105005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39221.

The product of its (nonzero) digits is 625, while the sum is 24.

The spelling of 51511105005 in words is "fifty-one billion, five hundred eleven million, one hundred five thousand, five".