51125222 has 8 divisors (see below), whose sum is σ = 81198936. Its totient is φ = 24058912.

The previous prime is 51125201. The next prime is 51125279. The reversal of 51125222 is 22252115.

It is a happy number.

51125222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51125222² = 5227576649098568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51125194 and 51125203.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 751808 + ... + 751875.

It is an arithmetic number, because the mean of its divisors is an integer number (10149867).

Almost surely, 2^51125222 is an apocalyptic number.

51125222 is a deficient number, since it is larger than the sum of its proper divisors (30073714).

51125222 is a wasteful number, since it uses less digits than its factorization.

51125222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503702.

The product of its digits is 400, while the sum is 20.

The square root of 51125222 is about 7150.1903471166. The cubic root of 51125222 is about 371.1462432295.

Adding to 51125222 its reverse (22252115), we get a palindrome (73377337).

The spelling of 51125222 in words is "fifty-one million, one hundred twenty-five thousand, two hundred twenty-two".