51044221 has 8 divisors (see below), whose sum is σ = 52706304. Its totient is φ = 49402080.

The previous prime is 51044179. The next prime is 51044233. The reversal of 51044221 is 12244015.

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

It is a cyclic number.

It is not a de Polignac number, because 51044221 - 2⁷ = 51044093 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 (51044261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306 + ... + 10108.

It is an arithmetic number, because the mean of its divisors is an integer number (6588288).

Almost surely, 2^51044221 is an apocalyptic number.

It is an amenable number.

51044221 is a deficient number, since it is larger than the sum of its proper divisors (1662083).

51044221 is a wasteful number, since it uses less digits than its factorization.

51044221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9971.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 51044221 is about 7144.5238469754. The cubic root of 51044221 is about 370.9501292783.

Adding to 51044221 its reverse (12244015), we get a palindrome (63288236).

The spelling of 51044221 in words is "fifty-one million, forty-four thousand, two hundred twenty-one".