51072447 has 16 divisors (see below), whose sum is σ = 69189120. Its totient is φ = 33506592.

The previous prime is 51072391. The next prime is 51072449. The reversal of 51072447 is 74427015.

It is not a de Polignac number, because 51072447 - 2⁷ = 51072319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51072449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60454 + ... + 61292.

It is an arithmetic number, because the mean of its divisors is an integer number (4324320).

Almost surely, 2^51072447 is an apocalyptic number.

51072447 is a deficient number, since it is larger than the sum of its proper divisors (18116673).

51072447 is a wasteful number, since it uses less digits than its factorization.

51072447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 51072447 is about 7146.4989330441. The cubic root of 51072447 is about 371.0184916302.

The spelling of 51072447 in words is "fifty-one million, seventy-two thousand, four hundred forty-seven".