51005101091 has 8 divisors (see below), whose sum is σ = 58467654144. Its totient is φ = 43586575560.

The previous prime is 51005101087. The next prime is 51005101117. The reversal of 51005101091 is 19010150015.

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

It is a cyclic number.

It is not a de Polignac number, because 51005101091 - 2² = 51005101087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51005101031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11004395 + ... + 11009028.

It is an arithmetic number, because the mean of its divisors is an integer number (7308456768).

Almost surely, 2^51005101091 is an apocalyptic number.

51005101091 is a deficient number, since it is larger than the sum of its proper divisors (7462553053).

51005101091 is a wasteful number, since it uses less digits than its factorization.

51005101091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22013761.

The product of its (nonzero) digits is 225, while the sum is 23.

The spelling of 51005101091 in words is "fifty-one billion, five million, one hundred one thousand, ninety-one".