51221450322 has 24 divisors (see below), whose sum is σ = 126834067776. Its totient is φ = 14634700056.

The previous prime is 51221450321. The next prime is 51221450339. The reversal of 51221450322 is 22305412215.

51221450322 is a `hidden beast` number, since 5 + 122 + 14 + 503 + 22 = 666.

51221450322 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51221450322² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51221450321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203259598 + ... + 203259849.

It is an arithmetic number, because the mean of its divisors is an integer number (5284752824).

Almost surely, 2^51221450322 is an apocalyptic number.

51221450322 is an abundant number, since it is smaller than the sum of its proper divisors (75612617454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51221450322 is a wasteful number, since it uses less digits than its factorization.

51221450322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406519462 (or 406519459 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 51221450322 its reverse (22305412215), we get a palindrome (73526862537).

The spelling of 51221450322 in words is "fifty-one billion, two hundred twenty-one million, four hundred fifty thousand, three hundred twenty-two".