51650 has 12 divisors (see below), whose sum is σ = 96162. Its totient is φ = 20640.

The previous prime is 51647. The next prime is 51659. The reversal of 51650 is 5615.

It can be written as a sum of positive squares in 3 ways, for example, as 48841 + 2809 = 221^2 + 53^2 .

It is not an unprimeable number, because it can be changed into a prime (51659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 467 + ... + 566.

2⁵¹⁶⁵⁰ is an apocalyptic number.

51650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51650 is a deficient number, since it is larger than the sum of its proper divisors (44512).

51650 is a wasteful number, since it uses less digits than its factorization.

51650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045 (or 1040 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 51650 is about 227.2663635473. The cubic root of 51650 is about 37.2411807417.

The spelling of 51650 in words is "fifty-one thousand, six hundred fifty".