51305723 has 8 divisors (see below), whose sum is σ = 59024640. Its totient is φ = 43684200.

The previous prime is 51305707. The next prime is 51305731. The reversal of 51305723 is 32750315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51305723 - 2⁴ = 51305707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51305692 and 51305701.

It is not an unprimeable number, because it can be changed into a prime (51305743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23213 + ... + 25326.

It is an arithmetic number, because the mean of its divisors is an integer number (7378080).

Almost surely, 2^51305723 is an apocalyptic number.

51305723 is a deficient number, since it is larger than the sum of its proper divisors (7718917).

51305723 is a wasteful number, since it uses less digits than its factorization.

51305723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48697.

The product of its (nonzero) digits is 3150, while the sum is 26.

The square root of 51305723 is about 7162.8013374657. The cubic root of 51305723 is about 371.5825157090.

The spelling of 51305723 in words is "fifty-one million, three hundred five thousand, seven hundred twenty-three".