51012071 has 4 divisors (see below), whose sum is σ = 55649544. Its totient is φ = 46374600.

The previous prime is 51012067. The next prime is 51012079. The reversal of 51012071 is 17021015.

51012071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51012071 - 2² = 51012067 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 (51012079) 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 3 ways as a sum of consecutive naturals, for example, 2318720 + ... + 2318741.

It is an arithmetic number, because the mean of its divisors is an integer number (13912386).

Almost surely, 2^51012071 is an apocalyptic number.

51012071 is a deficient number, since it is larger than the sum of its proper divisors (4637473).

51012071 is a wasteful number, since it uses less digits than its factorization.

51012071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4637472.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 51012071 is about 7142.2735175853. The cubic root of 51012071 is about 370.8722324328.

Adding to 51012071 its reverse (17021015), we get a palindrome (68033086).

The spelling of 51012071 in words is "fifty-one million, twelve thousand, seventy-one".