51115722105 has 32 divisors (see below), whose sum is σ = 93660770304. Its totient is φ = 23319182016.

The previous prime is 51115722101. The next prime is 51115722121. The reversal of 51115722105 is 50122751115.

It is not a de Polignac number, because 51115722105 - 2² = 51115722101 is a prime.

It is a super-2 number, since 2×51115722105² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51115722101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 448677 + ... + 550946.

It is an arithmetic number, because the mean of its divisors is an integer number (2926899072).

Almost surely, 2^51115722105 is an apocalyptic number.

It is an amenable number.

51115722105 is a deficient number, since it is larger than the sum of its proper divisors (42545048199).

51115722105 is a wasteful number, since it uses less digits than its factorization.

51115722105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000125.

The product of its (nonzero) digits is 3500, while the sum is 30.

The spelling of 51115722105 in words is "fifty-one billion, one hundred fifteen million, seven hundred twenty-two thousand, one hundred five".