51011225 has 6 divisors (see below), whose sum is σ = 63253950. Its totient is φ = 40808960.

The previous prime is 51011209. The next prime is 51011239. The reversal of 51011225 is 52211015.

51011225 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 473344 + 50537881 = 688^2 + 7109^2 .

It is not a de Polignac number, because 51011225 - 2⁴ = 51011209 is a prime.

It is a Curzon 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 5 ways as a sum of consecutive naturals, for example, 1020200 + ... + 1020249.

It is an arithmetic number, because the mean of its divisors is an integer number (10542325).

Almost surely, 2^51011225 is an apocalyptic number.

It is an amenable number.

51011225 is a deficient number, since it is larger than the sum of its proper divisors (12242725).

51011225 is a wasteful number, since it uses less digits than its factorization.

51011225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040459 (or 2040454 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 51011225 is about 7142.2142925006. The cubic root of 51011225 is about 370.8701822015.

The spelling of 51011225 in words is "fifty-one million, eleven thousand, two hundred twenty-five".