51944665 has 8 divisors (see below), whose sum is σ = 63211968. Its totient is φ = 40970160.

The previous prime is 51944657. The next prime is 51944693. The reversal of 51944665 is 56644915.

It is a happy number.

51944665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51944665 - 2³ = 51944657 is a prime.

It is a Duffinian 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, 72807 + ... + 73516.

It is an arithmetic number, because the mean of its divisors is an integer number (7901496).

Almost surely, 2^51944665 is an apocalyptic number.

It is an amenable number.

51944665 is a deficient number, since it is larger than the sum of its proper divisors (11267303).

51944665 is a wasteful number, since it uses less digits than its factorization.

51944665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146399.

The product of its digits is 129600, while the sum is 40.

The square root of 51944665 is about 7207.2647377490. The cubic root of 51944665 is about 373.1186722139.

The spelling of 51944665 in words is "fifty-one million, nine hundred forty-four thousand, six hundred sixty-five".