51017828 has 6 divisors (see below), whose sum is σ = 89281206. Its totient is φ = 25508912.

The previous prime is 51017809. The next prime is 51017851. The reversal of 51017828 is 82871015.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 47997184 + 3020644 = 6928^2 + 1738^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51017794 and 51017803.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6377225 + ... + 6377232.

It is an arithmetic number, because the mean of its divisors is an integer number (14880201).

Almost surely, 2^51017828 is an apocalyptic number.

It is an amenable number.

51017828 is a deficient number, since it is larger than the sum of its proper divisors (38263378).

51017828 is a wasteful number, since it uses less digits than its factorization.

51017828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12754461 (or 12754459 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 51017828 is about 7142.6765291451. The cubic root of 51017828 is about 370.8861835826.

The spelling of 51017828 in words is "fifty-one million, seventeen thousand, eight hundred twenty-eight".