51202225 has 12 divisors (see below), whose sum is σ = 63622044. Its totient is φ = 40877120.

The previous prime is 51202199. The next prime is 51202231. The reversal of 51202225 is 52220215.

It can be written as a sum of positive squares in 6 ways, for example, as 2537649 + 48664576 = 1593^2 + 6976^2 .

It is not a de Polignac number, because 51202225 - 2⁷ = 51202097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12087 + ... + 15763.

It is an arithmetic number, because the mean of its divisors is an integer number (5301837).

Almost surely, 2^51202225 is an apocalyptic number.

It is an amenable number.

51202225 is a deficient number, since it is larger than the sum of its proper divisors (12419819).

51202225 is a wasteful number, since it uses less digits than its factorization.

51202225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4244 (or 4239 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 51202225 is about 7155.5730029118. The cubic root of 51202225 is about 371.3324855357.

The spelling of 51202225 in words is "fifty-one million, two hundred two thousand, two hundred twenty-five".