51335250 has 32 divisors (see below), whose sum is σ = 128134656. Its totient is φ = 13689200.

The previous prime is 51335237. The next prime is 51335281. The reversal of 51335250 is 5253315.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51335250.

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 15 ways as a sum of consecutive naturals, for example, 33474 + ... + 34973.

It is an arithmetic number, because the mean of its divisors is an integer number (4004208).

Almost surely, 2^51335250 is an apocalyptic number.

51335250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51335250 is an abundant number, since it is smaller than the sum of its proper divisors (76799406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51335250 is a wasteful number, since it uses less digits than its factorization.

51335250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68467 (or 68457 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 51335250 is about 7164.8621759249. The cubic root of 51335250 is about 371.6537852945.

Adding to 51335250 its reverse (5253315), we get a palindrome (56588565).

The spelling of 51335250 in words is "fifty-one million, three hundred thirty-five thousand, two hundred fifty".