51105025133 has 12 divisors (see below), whose sum is σ = 54473410740. Its totient is φ = 47934607872.

The previous prime is 51105025129. The next prime is 51105025141. The reversal of 51105025133 is 33152050115.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 21714380164 + 29390644969 = 147358^2 + 171437^2 .

It is not a de Polignac number, because 51105025133 - 2² = 51105025129 is a prime.

It is a super-2 number, since 2×51105025133² (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 (51105025193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217088 + ... + 386441.

It is an arithmetic number, because the mean of its divisors is an integer number (4539450895).

Almost surely, 2^51105025133 is an apocalyptic number.

It is an amenable number.

51105025133 is a deficient number, since it is larger than the sum of its proper divisors (3368385607).

51105025133 is a wasteful number, since it uses less digits than its factorization.

51105025133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603856 (or 603839 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 26.

Adding to 51105025133 its reverse (33152050115), we get a palindrome (84257075248).

The spelling of 51105025133 in words is "fifty-one billion, one hundred five million, twenty-five thousand, one hundred thirty-three".