51055505011001 has 4 divisors (see below), whose sum is σ = 51066468190452. Its totient is φ = 51044541831552.

The previous prime is 51055505010997. The next prime is 51055505011009. The reversal of 51055505011001 is 10011050555015.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8661719886400 + 42393785124601 = 2943080^2 + 6511051^2 .

It is a cyclic number.

It is not a de Polignac number, because 51055505011001 - 2² = 51055505010997 is a prime.

It is a super-2 number, since 2×51055505011001² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51055505011009) 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, 5481582740 + ... + 5481592053.

It is an arithmetic number, because the mean of its divisors is an integer number (12766617047613).

Almost surely, 2^{51055505011001} is an apocalyptic number.

It is an amenable number.

51055505011001 is a deficient number, since it is larger than the sum of its proper divisors (10963179451).

51055505011001 is a wasteful number, since it uses less digits than its factorization.

51055505011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10963179450.

The product of its (nonzero) digits is 3125, while the sum is 29.

Adding to 51055505011001 its reverse (10011050555015), we get a palindrome (61066555566016).

The spelling of 51055505011001 in words is "fifty-one trillion, fifty-five billion, five hundred five million, eleven thousand, one".