51804739 has 8 divisors (see below), whose sum is σ = 59516928. Its totient is φ = 44170440.

The previous prime is 51804733. The next prime is 51804743. The reversal of 51804739 is 93740815.

51804739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 51804739 - 2⁵ = 51804707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51804698 and 51804707.

It is not an unprimeable number, because it can be changed into a prime (51804733) 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 7 ways as a sum of consecutive naturals, for example, 18037 + ... + 20710.

It is an arithmetic number, because the mean of its divisors is an integer number (7439616).

Almost surely, 2^51804739 is an apocalyptic number.

51804739 is a deficient number, since it is larger than the sum of its proper divisors (7712189).

51804739 is a wasteful number, since it uses less digits than its factorization.

51804739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38945.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 51804739 is about 7197.5509029114. The cubic root of 51804739 is about 372.7833413192.

The spelling of 51804739 in words is "fifty-one million, eight hundred four thousand, seven hundred thirty-nine".