51040445 has 8 divisors (see below), whose sum is σ = 61288920. Its totient is φ = 40805440.

The previous prime is 51040433. The next prime is 51040471. The reversal of 51040445 is 54404015.

51040445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 20448484 + 30591961 = 4522^2 + 5531^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51040445 - 2²² = 46846141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51040445.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9335 + ... + 13755.

It is an arithmetic number, because the mean of its divisors is an integer number (7661115).

Almost surely, 2^51040445 is an apocalyptic number.

It is an amenable number.

51040445 is a deficient number, since it is larger than the sum of its proper divisors (10248475).

51040445 is a wasteful number, since it uses less digits than its factorization.

51040445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6735.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 51040445 is about 7144.2595837497. The cubic root of 51040445 is about 370.9409820317.

The spelling of 51040445 in words is "fifty-one million, forty thousand, four hundred forty-five".