51206520110003 has 4 divisors (see below), whose sum is σ = 51206683776768. Its totient is φ = 51206356443240.

The previous prime is 51206520109951. The next prime is 51206520110093. The reversal of 51206520110003 is 30001102560215.

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

It is a cyclic number.

It is not a de Polignac number, because 51206520110003 - 2²⁸ = 51206251674547 is a prime.

It is a super-2 number, since 2×51206520110003² (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 (51206520110093) 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, 81363176 + ... + 81990117.

It is an arithmetic number, because the mean of its divisors is an integer number (12801670944192).

Almost surely, 2^{51206520110003} is an apocalyptic number.

51206520110003 is a deficient number, since it is larger than the sum of its proper divisors (163666765).

51206520110003 is a wasteful number, since it uses less digits than its factorization.

51206520110003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163666764.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 51206520110003 its reverse (30001102560215), we get a palindrome (81207622670218).

The spelling of 51206520110003 in words is "fifty-one trillion, two hundred six billion, five hundred twenty million, one hundred ten thousand, three".