51434136211123 has 4 divisors (see below), whose sum is σ = 51749683059208. Its totient is φ = 51118589363040.

The previous prime is 51434136211063. The next prime is 51434136211163. The reversal of 51434136211123 is 32111263143415.

It is a happy number.

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 51434136211123 - 2¹⁷ = 51434136080051 is a prime.

It is a super-2 number, since 2×51434136211123² (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 (51434136211163) 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, 157773423798 + ... + 157773424123.

It is an arithmetic number, because the mean of its divisors is an integer number (12937420764802).

Almost surely, 2^{51434136211123} is an apocalyptic number.

51434136211123 is a deficient number, since it is larger than the sum of its proper divisors (315546848085).

51434136211123 is a wasteful number, since it uses less digits than its factorization.

51434136211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315546848084.

The product of its digits is 51840, while the sum is 37.

Adding to 51434136211123 its reverse (32111263143415), we get a palindrome (83545399354538).

The spelling of 51434136211123 in words is "fifty-one trillion, four hundred thirty-four billion, one hundred thirty-six million, two hundred eleven thousand, one hundred twenty-three".