51717225 has 48 divisors (see below), whose sum is σ = 101993472. Its totient is φ = 22608960.

The previous prime is 51717191. The next prime is 51717229. The reversal of 51717225 is 52271715.

It is not a de Polignac number, because 51717225 - 2⁸ = 51716969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51717192 and 51717201.

It is not an unprimeable number, because it can be changed into a prime (51717229) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 9934 + ... + 14216.

It is an arithmetic number, because the mean of its divisors is an integer number (2124864).

Almost surely, 2^51717225 is an apocalyptic number.

It is an amenable number.

51717225 is a deficient number, since it is larger than the sum of its proper divisors (50276247).

51717225 is a wasteful number, since it uses less digits than its factorization.

51717225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4326 (or 4321 counting only the distinct ones).

The product of its digits is 4900, while the sum is 30.

The square root of 51717225 is about 7191.4689041947. The cubic root of 51717225 is about 372.5733080950.

The spelling of 51717225 in words is "fifty-one million, seven hundred seventeen thousand, two hundred twenty-five".