51004727 has 4 divisors (see below), whose sum is σ = 51023400. Its totient is φ = 50986056.

The previous prime is 51004717. The next prime is 51004739. The reversal of 51004727 is 72740015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72740015 = 5 ⋅14548003.

It is a cyclic number.

It is not a de Polignac number, because 51004727 - 2⁴ = 51004711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51004696 and 51004705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51004717) 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, 4352 + ... + 10997.

It is an arithmetic number, because the mean of its divisors is an integer number (12755850).

Almost surely, 2^51004727 is an apocalyptic number.

51004727 is a deficient number, since it is larger than the sum of its proper divisors (18673).

51004727 is a wasteful number, since it uses less digits than its factorization.

51004727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18672.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 51004727 is about 7141.7593770723. The cubic root of 51004727 is about 370.8544339240.

The spelling of 51004727 in words is "fifty-one million, four thousand, seven hundred twenty-seven".