51425250 has 32 divisors (see below), whose sum is σ = 128359296. Its totient is φ = 13713200.

The previous prime is 51425243. The next prime is 51425273. The reversal of 51425250 is 5252415.

It is a happy number.

51425250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51425250.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33534 + ... + 35033.

It is an arithmetic number, because the mean of its divisors is an integer number (4011228).

Almost surely, 2^51425250 is an apocalyptic number.

51425250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51425250 is an abundant number, since it is smaller than the sum of its proper divisors (76934046).

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

51425250 is a wasteful number, since it uses less digits than its factorization.

51425250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68587 (or 68577 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 51425250 is about 7171.1400767242. The cubic root of 51425250 is about 371.8708506469.

Adding to 51425250 its reverse (5252415), we get a palindrome (56677665).

The spelling of 51425250 in words is "fifty-one million, four hundred twenty-five thousand, two hundred fifty".