51211522444 has 12 divisors (see below), whose sum is σ = 89781066144. Its totient is φ = 25559789264.

The previous prime is 51211522409. The next prime is 51211522447. The reversal of 51211522444 is 44422511215.

It is not an unprimeable number, because it can be changed into a prime (51211522447) 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, 11490484 + ... + 11494939.

It is an arithmetic number, because the mean of its divisors is an integer number (7481755512).

Almost surely, 2^51211522444 is an apocalyptic number.

It is an amenable number.

51211522444 is a deficient number, since it is larger than the sum of its proper divisors (38569543700).

51211522444 is a wasteful number, since it uses less digits than its factorization.

51211522444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22985984 (or 22985982 counting only the distinct ones).

The product of its digits is 12800, while the sum is 31.

The spelling of 51211522444 in words is "fifty-one billion, two hundred eleven million, five hundred twenty-two thousand, four hundred forty-four".