51340225 has 12 divisors (see below), whose sum is σ = 63751996. Its totient is φ = 41014080.

The previous prime is 51340217. The next prime is 51340229. The reversal of 51340225 is 52204315.

51340225 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 6 ways, for example, as 11498881 + 39841344 = 3391^2 + 6312^2 .

It is not a de Polignac number, because 51340225 - 2³ = 51340217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51340196 and 51340205.

It is not an unprimeable number, because it can be changed into a prime (51340229) 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 11 ways as a sum of consecutive naturals, for example, 29479 + ... + 31171.

Almost surely, 2^51340225 is an apocalyptic number.

It is an amenable number.

51340225 is a deficient number, since it is larger than the sum of its proper divisors (12411771).

51340225 is a wasteful number, since it uses less digits than its factorization.

51340225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916 (or 2911 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 51340225 is about 7165.2093479535. The cubic root of 51340225 is about 371.6657908063.

The spelling of 51340225 in words is "fifty-one million, three hundred forty thousand, two hundred twenty-five".