51226562117 has 4 divisors (see below), whose sum is σ = 51241953420. Its totient is φ = 51211170816.

The previous prime is 51226562047. The next prime is 51226562137. The reversal of 51226562117 is 71126562215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71126562215 = 5 ⋅14225312443.

It can be written as a sum of positive squares in 2 ways, for example, as 39565585921 + 11660976196 = 198911^2 + 107986^2 .

It is a cyclic number.

It is not a de Polignac number, because 51226562117 - 2²² = 51222367813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51226562137) 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, 7690658 + ... + 7697315.

It is an arithmetic number, because the mean of its divisors is an integer number (12810488355).

Almost surely, 2^51226562117 is an apocalyptic number.

It is an amenable number.

51226562117 is a deficient number, since it is larger than the sum of its proper divisors (15391303).

51226562117 is a wasteful number, since it uses less digits than its factorization.

51226562117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15391302.

The product of its digits is 50400, while the sum is 38.

The spelling of 51226562117 in words is "fifty-one billion, two hundred twenty-six million, five hundred sixty-two thousand, one hundred seventeen".