51221450323 has 4 divisors (see below), whose sum is σ = 51674737608. Its totient is φ = 50768163040.

The previous prime is 51221450321. The next prime is 51221450339. The reversal of 51221450323 is 32305412215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32305412215 = 5 ⋅6461082443.

It is a cyclic number.

It is not a de Polignac number, because 51221450323 - 2¹ = 51221450321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51221450291 and 51221450300.

It is not an unprimeable number, because it can be changed into a prime (51221450321) 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 3 ways as a sum of consecutive naturals, for example, 226643473 + ... + 226643698.

It is an arithmetic number, because the mean of its divisors is an integer number (12918684402).

Almost surely, 2^51221450323 is an apocalyptic number.

51221450323 is a deficient number, since it is larger than the sum of its proper divisors (453287285).

51221450323 is a wasteful number, since it uses less digits than its factorization.

51221450323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453287284.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 51221450323 its reverse (32305412215), we get a palindrome (83526862538).

The spelling of 51221450323 in words is "fifty-one billion, two hundred twenty-one million, four hundred fifty thousand, three hundred twenty-three".