51002225 has 6 divisors (see below), whose sum is σ = 63242790. Its totient is φ = 40801760.

The previous prime is 51002221. The next prime is 51002239. The reversal of 51002225 is 52220015.

51002225 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 9412624 + 41589601 = 3068^2 + 6449^2 .

It is not a de Polignac number, because 51002225 - 2² = 51002221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51002221) by changing a digit.

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, 1020020 + ... + 1020069.

It is an arithmetic number, because the mean of its divisors is an integer number (10540465).

Almost surely, 2^51002225 is an apocalyptic number.

It is an amenable number.

51002225 is a deficient number, since it is larger than the sum of its proper divisors (12240565).

51002225 is a wasteful number, since it uses less digits than its factorization.

51002225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040099 (or 2040094 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 51002225 is about 7141.5842080032. The cubic root of 51002225 is about 370.8483698261.

The spelling of 51002225 in words is "fifty-one million, two thousand, two hundred twenty-five".