51378650 has 24 divisors (see below), whose sum is σ = 95928384. Its totient is φ = 20473200.

The previous prime is 51378623. The next prime is 51378659. The reversal of 51378650 is 5687315.

It is a self number, because there is not a number n which added to its sum of digits gives 51378650.

It is not an unprimeable number, because it can be changed into a prime (51378659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12335 + ... + 15965.

It is an arithmetic number, because the mean of its divisors is an integer number (3997016).

Almost surely, 2^51378650 is an apocalyptic number.

51378650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51378650 is a deficient number, since it is larger than the sum of its proper divisors (44549734).

51378650 is a wasteful number, since it uses less digits than its factorization.

51378650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3926 (or 3921 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 51378650 is about 7167.8902056323. The cubic root of 51378650 is about 371.7584906767.

The spelling of 51378650 in words is "fifty-one million, three hundred seventy-eight thousand, six hundred fifty".