51101105550051 has 4 divisors (see below), whose sum is σ = 68134807400072. Its totient is φ = 34067403700032.

The previous prime is 51101105550041. The next prime is 51101105550101. The reversal of 51101105550051 is 15005550110115.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-51101105550051 is a prime.

It is a super-2 number, since 2×51101105550051² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51101105550031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8516850925006 + ... + 8516850925011.

It is an arithmetic number, because the mean of its divisors is an integer number (17033701850018).

Almost surely, 2^{51101105550051} is an apocalyptic number.

51101105550051 is a deficient number, since it is larger than the sum of its proper divisors (17033701850021).

51101105550051 is a wasteful number, since it uses less digits than its factorization.

51101105550051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17033701850020.

The product of its (nonzero) digits is 3125, while the sum is 30.

Adding to 51101105550051 its reverse (15005550110115), we get a palindrome (66106655660166).

The spelling of 51101105550051 in words is "fifty-one trillion, one hundred one billion, one hundred five million, five hundred fifty thousand, fifty-one".