51294225 has 12 divisors (see below), whose sum is σ = 84806576. Its totient is φ = 27356880.

The previous prime is 51294223. The next prime is 51294233. The reversal of 51294225 is 52249215.

It is not a de Polignac number, because 51294225 - 2¹ = 51294223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51294192 and 51294201.

It is not an unprimeable number, because it can be changed into a prime (51294223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 341887 + ... + 342036.

Almost surely, 2^51294225 is an apocalyptic number.

It is an amenable number.

51294225 is a deficient number, since it is larger than the sum of its proper divisors (33512351).

51294225 is a wasteful number, since it uses less digits than its factorization.

51294225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683936 (or 683931 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 51294225 is about 7161.9986735548. The cubic root of 51294225 is about 371.5547554858.

The spelling of 51294225 in words is "fifty-one million, two hundred ninety-four thousand, two hundred twenty-five".