51302225 has 24 divisors (see below), whose sum is σ = 70120512. Its totient is φ = 36993600.

The previous prime is 51302221. The next prime is 51302231. The reversal of 51302225 is 52220315.

It is not a de Polignac number, because 51302225 - 2² = 51302221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51302197 and 51302206.

It is not an unprimeable number, because it can be changed into a prime (51302221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12140 + ... + 15810.

It is an arithmetic number, because the mean of its divisors is an integer number (2921688).

Almost surely, 2^51302225 is an apocalyptic number.

It is an amenable number.

51302225 is a deficient number, since it is larger than the sum of its proper divisors (18818287).

51302225 is a wasteful number, since it uses less digits than its factorization.

51302225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3737 (or 3732 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 51302225 is about 7162.5571550948. The cubic root of 51302225 is about 371.5740707435.

The spelling of 51302225 in words is "fifty-one million, three hundred two thousand, two hundred twenty-five".