51430250 has 16 divisors (see below), whose sum is σ = 96277896. Its totient is φ = 20572000.

The previous prime is 51430237. The next prime is 51430261. The reversal of 51430250 is 5203415.

It can be written as a sum of positive squares in 4 ways, for example, as 20638849 + 30791401 = 4543^2 + 5549^2 .

It is a Curzon number.

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 in 7 ways as a sum of consecutive naturals, for example, 102611 + ... + 103110.

Almost surely, 2^51430250 is an apocalyptic number.

51430250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51430250 is a deficient number, since it is larger than the sum of its proper divisors (44847646).

51430250 is a wasteful number, since it uses less digits than its factorization.

51430250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205738 (or 205728 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 51430250 is about 7171.4886878528. The cubic root of 51430250 is about 371.8829024049.

Adding to 51430250 its reverse (5203415), we get a palindrome (56633665).

The spelling of 51430250 in words is "fifty-one million, four hundred thirty thousand, two hundred fifty".