51225625 has 20 divisors (see below), whose sum is σ = 69840144. Its totient is φ = 37250000.

The previous prime is 51225617. The next prime is 51225637. The reversal of 51225625 is 52652215.

It is not a de Polignac number, because 51225625 - 2³ = 51225617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51225593 and 51225602.

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 19 ways as a sum of consecutive naturals, for example, 3150 + ... + 10600.

Almost surely, 2^51225625 is an apocalyptic number.

51225625 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51225625 is a deficient number, since it is larger than the sum of its proper divisors (18614519).

51225625 is an equidigital number, since it uses as much as digits as its factorization.

51225625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7482 (or 7467 counting only the distinct ones).

The product of its digits is 6000, while the sum is 28.

The square root of 51225625 is about 7157.2079053217. The cubic root of 51225625 is about 371.3890446456.

The spelling of 51225625 in words is "fifty-one million, two hundred twenty-five thousand, six hundred twenty-five".