51105510511 has 12 divisors (see below), whose sum is σ = 56281714272. Its totient is φ = 46370324000.

The previous prime is 51105510499. The next prime is 51105510529. The reversal of 51105510511 is 11501550115.

51105510511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51105510511 - 2⁵ = 51105510479 is a prime.

It is a super-2 number, since 2×51105510511² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51105510581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 342295 + ... + 468376.

It is an arithmetic number, because the mean of its divisors is an integer number (4690142856).

Almost surely, 2^51105510511 is an apocalyptic number.

51105510511 is a deficient number, since it is larger than the sum of its proper divisors (5176203761).

51105510511 is a wasteful number, since it uses less digits than its factorization.

51105510511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811214 (or 811203 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 25.

The spelling of 51105510511 in words is "fifty-one billion, one hundred five million, five hundred ten thousand, five hundred eleven".