51731723 has 4 divisors (see below), whose sum is σ = 51820440. Its totient is φ = 51643008.

The previous prime is 51731717. The next prime is 51731747. The reversal of 51731723 is 32713715.

51731723 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, and also an emirpimes, since its reverse is a distinct semiprime: 32713715 = 5 ⋅6542743.

It is a cyclic number.

It is not a de Polignac number, because 51731723 - 2⁴ = 51731707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51731753) 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, 43478 + ... + 44651.

It is an arithmetic number, because the mean of its divisors is an integer number (12955110).

Almost surely, 2^51731723 is an apocalyptic number.

51731723 is a deficient number, since it is larger than the sum of its proper divisors (88717).

51731723 is an equidigital number, since it uses as much as digits as its factorization.

51731723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88716.

The product of its digits is 4410, while the sum is 29.

The square root of 51731723 is about 7192.4768334698. The cubic root of 51731723 is about 372.6081195990.

The spelling of 51731723 in words is "fifty-one million, seven hundred thirty-one thousand, seven hundred twenty-three".