51007721105 has 8 divisors (see below), whose sum is σ = 66773744064. Its totient is φ = 37096524400.

The previous prime is 51007721087. The next prime is 51007721117. The reversal of 51007721105 is 50112770015.

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

It is not a de Polignac number, because 51007721105 - 2⁸ = 51007720849 is a prime.

It is a super-2 number, since 2×51007721105² (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, 463706501 + ... + 463706610.

It is an arithmetic number, because the mean of its divisors is an integer number (8346718008).

Almost surely, 2^51007721105 is an apocalyptic number.

51007721105 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51007721105 is a deficient number, since it is larger than the sum of its proper divisors (15766022959).

51007721105 is a wasteful number, since it uses less digits than its factorization.

51007721105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927413127.

The product of its (nonzero) digits is 2450, while the sum is 29.

The spelling of 51007721105 in words is "fifty-one billion, seven million, seven hundred twenty-one thousand, one hundred five".