51445071 has 32 divisors (see below), whose sum is σ = 79185920. Its totient is φ = 32985792.

The previous prime is 51445067. The next prime is 51445091. The reversal of 51445071 is 17054415.

It is a happy number.

It is not a de Polignac number, because 51445071 - 2² = 51445067 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51445091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84450 + ... + 85056.

It is an arithmetic number, because the mean of its divisors is an integer number (2474560).

Almost surely, 2^51445071 is an apocalyptic number.

51445071 is a deficient number, since it is larger than the sum of its proper divisors (27740849).

51445071 is a wasteful number, since it uses less digits than its factorization.

51445071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 51445071 is about 7172.5219414095. The cubic root of 51445071 is about 371.9186216371.

Adding to 51445071 its reverse (17054415), we get a palindrome (68499486).

The spelling of 51445071 in words is "fifty-one million, four hundred forty-five thousand, seventy-one".