51314728 has 8 divisors (see below), whose sum is σ = 96215130. Its totient is φ = 25657360.

The previous prime is 51314677. The next prime is 51314749. The reversal of 51314728 is 82741315.

It can be written as a sum of positive squares in only one way, i.e., 48748324 + 2566404 = 6982^2 + 1602^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 51314728.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3207163 + ... + 3207178.

Almost surely, 2^51314728 is an apocalyptic number.

It is an amenable number.

51314728 is a deficient number, since it is larger than the sum of its proper divisors (44900402).

51314728 is a wasteful number, since it uses less digits than its factorization.

51314728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6414347 (or 6414343 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 51314728 is about 7163.4299047314. The cubic root of 51314728 is about 371.6042540559.

The spelling of 51314728 in words is "fifty-one million, three hundred fourteen thousand, seven hundred twenty-eight".