51207705 has 24 divisors (see below), whose sum is σ = 89069760. Its totient is φ = 27215520.

The previous prime is 51207701. The next prime is 51207733. The reversal of 51207705 is 50770215.

51207705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51207705 - 2² = 51207701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51207701) 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 23 ways as a sum of consecutive naturals, for example, 12166 + ... + 15824.

It is an arithmetic number, because the mean of its divisors is an integer number (3711240).

Almost surely, 2^51207705 is an apocalyptic number.

It is an amenable number.

51207705 is a deficient number, since it is larger than the sum of its proper divisors (37862055).

51207705 is a wasteful number, since it uses less digits than its factorization.

51207705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3981 (or 3978 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 51207705 is about 7155.9559109877. The cubic root of 51207705 is about 371.3457325474.

The spelling of 51207705 in words is "fifty-one million, two hundred seven thousand, seven hundred five".