51105236423 has 4 divisors (see below), whose sum is σ = 53327203248. Its totient is φ = 48883269600.

The previous prime is 51105236419. The next prime is 51105236431. The reversal of 51105236423 is 32463250115.

It is a happy number.

51105236423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51105236423 - 2² = 51105236419 is a prime.

It is a super-2 number, since 2×51105236423² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51105236423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51105236723) 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, 1110983378 + ... + 1110983423.

It is an arithmetic number, because the mean of its divisors is an integer number (13331800812).

Almost surely, 2^51105236423 is an apocalyptic number.

51105236423 is a deficient number, since it is larger than the sum of its proper divisors (2221966825).

51105236423 is a wasteful number, since it uses less digits than its factorization.

51105236423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221966824.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 51105236423 its reverse (32463250115), we get a palindrome (83568486538).

The spelling of 51105236423 in words is "fifty-one billion, one hundred five million, two hundred thirty-six thousand, four hundred twenty-three".