51224906728 has 8 divisors (see below), whose sum is σ = 96046700130. Its totient is φ = 25612453360.

The previous prime is 51224906627. The next prime is 51224906731. The reversal of 51224906728 is 82760942215.

It can be written as a sum of positive squares in only one way, i.e., 27001719684 + 24223187044 = 164322^2 + 155638^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×51224906728³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3201556663 + ... + 3201556678.

Almost surely, 2^51224906728 is an apocalyptic number.

It is an amenable number.

51224906728 is a deficient number, since it is larger than the sum of its proper divisors (44821793402).

51224906728 is a wasteful number, since it uses less digits than its factorization.

51224906728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6403113347 (or 6403113343 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 51224906728 in words is "fifty-one billion, two hundred twenty-four million, nine hundred six thousand, seven hundred twenty-eight".