51173423 has 4 divisors (see below), whose sum is σ = 58483920. Its totient is φ = 43862928.

The previous prime is 51173411. The next prime is 51173443. The reversal of 51173423 is 32437115.

51173423 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 51173423 - 2⁴ = 51173407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51173392 and 51173401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51173443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3655238 + ... + 3655251.

It is an arithmetic number, because the mean of its divisors is an integer number (14620980).

Almost surely, 2^51173423 is an apocalyptic number.

51173423 is a deficient number, since it is larger than the sum of its proper divisors (7310497).

51173423 is an equidigital number, since it uses as much as digits as its factorization.

51173423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7310496.

The product of its digits is 2520, while the sum is 26.

The square root of 51173423 is about 7153.5601626044. The cubic root of 51173423 is about 371.2628458259.

The spelling of 51173423 in words is "fifty-one million, one hundred seventy-three thousand, four hundred twenty-three".