51043121 has 4 divisors (see below), whose sum is σ = 51231744. Its totient is φ = 50854500.

The previous prime is 51043099. The next prime is 51043123. The reversal of 51043121 is 12134015.

51043121 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51043121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51043121.

It is not an unprimeable number, because it can be changed into a prime (51043123) 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, 93905 + ... + 94446.

It is an arithmetic number, because the mean of its divisors is an integer number (12807936).

Almost surely, 2^51043121 is an apocalyptic number.

It is an amenable number.

51043121 is a deficient number, since it is larger than the sum of its proper divisors (188623).

51043121 is a wasteful number, since it uses less digits than its factorization.

51043121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188622.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 51043121 is about 7144.4468645235. The cubic root of 51043121 is about 370.9474646079.

Adding to 51043121 its reverse (12134015), we get a palindrome (63177136).

The spelling of 51043121 in words is "fifty-one million, forty-three thousand, one hundred twenty-one".