51310221473 has 12 divisors (see below), whose sum is σ = 59999910912. Its totient is φ = 43749919080.

The previous prime is 51310221421. The next prime is 51310221481. The reversal of 51310221473 is 37412201315.

It is a de Polignac number, because none of the positive numbers 2^k-51310221473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51310221673) 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 11 ways as a sum of consecutive naturals, for example, 2731865 + ... + 2750582.

It is an arithmetic number, because the mean of its divisors is an integer number (4999992576).

Almost surely, 2^51310221473 is an apocalyptic number.

It is an amenable number.

51310221473 is a deficient number, since it is larger than the sum of its proper divisors (8689689439).

51310221473 is a wasteful number, since it uses less digits than its factorization.

51310221473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5482652 (or 5482645 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 51310221473 its reverse (37412201315), we get a palindrome (88722422788).

The spelling of 51310221473 in words is "fifty-one billion, three hundred ten million, two hundred twenty-one thousand, four hundred seventy-three".