51043012321 has 16 divisors (see below), whose sum is σ = 59807574400. Its totient is φ = 43543740240.

The previous prime is 51043012313. The next prime is 51043012343. The reversal of 51043012321 is 12321034015.

It is a happy number.

It is not a de Polignac number, because 51043012321 - 2³ = 51043012313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51043012292 and 51043012301.

It is not an unprimeable number, because it can be changed into a prime (51043012121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280266 + ... + 425011.

It is an arithmetic number, because the mean of its divisors is an integer number (3737973400).

Almost surely, 2^51043012321 is an apocalyptic number.

It is an amenable number.

51043012321 is a deficient number, since it is larger than the sum of its proper divisors (8764562079).

51043012321 is an equidigital number, since it uses as much as digits as its factorization.

51043012321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705509 (or 705495 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 51043012321 its reverse (12321034015), we get a palindrome (63364046336).

The spelling of 51043012321 in words is "fifty-one billion, forty-three million, twelve thousand, three hundred twenty-one".