51011105505501 has 8 divisors (see below), whose sum is σ = 68070148930080. Its totient is φ = 33979732875632.

The previous prime is 51011105505469. The next prime is 51011105505523. The reversal of 51011105505501 is 10550550111015.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51011105505501 - 2⁵ = 51011105505469 is a prime.

It is a super-2 number, since 2×51011105505501² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51011105505601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6917694375 + ... + 6917701748.

It is an arithmetic number, because the mean of its divisors is an integer number (8508768616260).

Almost surely, 2^{51011105505501} is an apocalyptic number.

It is an amenable number.

51011105505501 is a deficient number, since it is larger than the sum of its proper divisors (17059043424579).

51011105505501 is a wasteful number, since it uses less digits than its factorization.

51011105505501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13835397355.

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

Adding to 51011105505501 its reverse (10550550111015), we get a palindrome (61561655616516).

The spelling of 51011105505501 in words is "fifty-one trillion, eleven billion, one hundred five million, five hundred five thousand, five hundred one".