51235225 has 6 divisors (see below), whose sum is σ = 63531710. Its totient is φ = 40988160.

The previous prime is 51235207. The next prime is 51235241. The reversal of 51235225 is 52253215.

It is a happy number.

51235225 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 5253264 + 45981961 = 2292^2 + 6781^2 .

It is not a de Polignac number, because 51235225 - 2⁵ = 51235193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 2049409 = 51235225 / (5 + 1 + 2 + 3 + 5 + 2 + 2 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 51235225.

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, 1024680 + ... + 1024729.

Almost surely, 2^51235225 is an apocalyptic number.

It is an amenable number.

51235225 is a deficient number, since it is larger than the sum of its proper divisors (12296485).

51235225 is a wasteful number, since it uses less digits than its factorization.

51235225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049419 (or 2049414 counting only the distinct ones).

The product of its digits is 3000, while the sum is 25.

The square root of 51235225 is about 7157.8785264909. The cubic root of 51235225 is about 371.4122434003.

The spelling of 51235225 in words is "fifty-one million, two hundred thirty-five thousand, two hundred twenty-five".