51125225 has 6 divisors (see below), whose sum is σ = 63395310. Its totient is φ = 40900160.

The previous prime is 51125201. The next prime is 51125279. The reversal of 51125225 is 52252115.

51125225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 885481 + 50239744 = 941^2 + 7088^2 .

It is not a de Polignac number, because 51125225 - 2¹⁶ = 51059689 is a prime.

It is a super-2 number, since 2×51125225² = 5227577262601250, which contains 22 as substring.

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 51125225.

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 5 ways as a sum of consecutive naturals, for example, 1022480 + ... + 1022529.

It is an arithmetic number, because the mean of its divisors is an integer number (10565885).

Almost surely, 2^51125225 is an apocalyptic number.

It is an amenable number.

51125225 is a deficient number, since it is larger than the sum of its proper divisors (12270085).

51125225 is a wasteful number, since it uses less digits than its factorization.

51125225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045019 (or 2045014 counting only the distinct ones).

The product of its digits is 1000, while the sum is 23.

The square root of 51125225 is about 7150.1905569013. The cubic root of 51125225 is about 371.1462504890.

The spelling of 51125225 in words is "fifty-one million, one hundred twenty-five thousand, two hundred twenty-five".