51043321 has 4 divisors (see below), whose sum is σ = 58335232. Its totient is φ = 43751412.

The previous prime is 51043273. The next prime is 51043327. The reversal of 51043321 is 12334015.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12334015 = 5 ⋅2466803.

It is a cyclic number.

It is not a de Polignac number, because 51043321 - 2¹⁷ = 50912249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51043327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3645945 + ... + 3645958.

It is an arithmetic number, because the mean of its divisors is an integer number (14583808).

Almost surely, 2^51043321 is an apocalyptic number.

It is an amenable number.

51043321 is a deficient number, since it is larger than the sum of its proper divisors (7291911).

51043321 is an equidigital number, since it uses as much as digits as its factorization.

51043321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7291910.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 51043321 is about 7144.4608613947. The cubic root of 51043321 is about 370.9479490963.

Adding to 51043321 its reverse (12334015), we get a palindrome (63377336).

The spelling of 51043321 in words is "fifty-one million, forty-three thousand, three hundred twenty-one".