51105000605511 has 4 divisors (see below), whose sum is σ = 68140000807352. Its totient is φ = 34070000403672.

The previous prime is 51105000605473. The next prime is 51105000605513. The reversal of 51105000605511 is 11550600050115.

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

It is not a de Polignac number, because 51105000605511 - 2¹⁰ = 51105000604487 is a prime.

It is a super-2 number, since 2×51105000605511² (a number of 28 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 (51105000605513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8517500100916 + ... + 8517500100921.

It is an arithmetic number, because the mean of its divisors is an integer number (17035000201838).

Almost surely, 2^{51105000605511} is an apocalyptic number.

51105000605511 is a deficient number, since it is larger than the sum of its proper divisors (17035000201841).

51105000605511 is a wasteful number, since it uses less digits than its factorization.

51105000605511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17035000201840.

The product of its (nonzero) digits is 3750, while the sum is 30.

Adding to 51105000605511 its reverse (11550600050115), we get a palindrome (62655600655626).

The spelling of 51105000605511 in words is "fifty-one trillion, one hundred five billion, six hundred five thousand, five hundred eleven".