51018320105 has 8 divisors (see below), whose sum is σ = 61283768064. Its totient is φ = 40773466800.

The previous prime is 51018320099. The next prime is 51018320189. The reversal of 51018320105 is 50102381015.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-51018320105 is a prime.

It is a super-2 number, since 2×51018320105² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5143211 + ... + 5153120.

It is an arithmetic number, because the mean of its divisors is an integer number (7660471008).

Almost surely, 2^51018320105 is an apocalyptic number.

It is an amenable number.

51018320105 is a deficient number, since it is larger than the sum of its proper divisors (10265447959).

51018320105 is a wasteful number, since it uses less digits than its factorization.

51018320105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10297327.

The product of its (nonzero) digits is 1200, while the sum is 26.

The spelling of 51018320105 in words is "fifty-one billion, eighteen million, three hundred twenty thousand, one hundred five".