51707447 has 4 divisors (see below), whose sum is σ = 56408136. Its totient is φ = 47006760.

The previous prime is 51707431. The next prime is 51707459. The reversal of 51707447 is 74470715.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51707447 - 2⁴ = 51707431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51707347) 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, 2350328 + ... + 2350349.

It is an arithmetic number, because the mean of its divisors is an integer number (14102034).

Almost surely, 2^51707447 is an apocalyptic number.

51707447 is a deficient number, since it is larger than the sum of its proper divisors (4700689).

51707447 is a wasteful number, since it uses less digits than its factorization.

51707447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4700688.

The product of its (nonzero) digits is 27440, while the sum is 35.

The square root of 51707447 is about 7190.7890387634. The cubic root of 51707447 is about 372.5498262253.

The spelling of 51707447 in words is "fifty-one million, seven hundred seven thousand, four hundred forty-seven".