51382250 has 16 divisors (see below), whose sum is σ = 96188040. Its totient is φ = 20552800.

The previous prime is 51382237. The next prime is 51382259. The reversal of 51382250 is 5228315.

It can be written as a sum of positive squares in 4 ways, for example, as 30924721 + 20457529 = 5561^2 + 4523^2 .

It is not an unprimeable number, because it can be changed into a prime (51382259) by changing a digit.

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, 102515 + ... + 103014.

Almost surely, 2^51382250 is an apocalyptic number.

51382250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51382250 is a deficient number, since it is larger than the sum of its proper divisors (44805790).

51382250 is a wasteful number, since it uses less digits than its factorization.

51382250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205546 (or 205536 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 51382250 is about 7168.1413211515. The cubic root of 51382250 is about 371.7671732671.

The spelling of 51382250 in words is "fifty-one million, three hundred eighty-two thousand, two hundred fifty".