51005125 has 8 divisors (see below), whose sum is σ = 63654552. Its totient is φ = 40804000.

The previous prime is 51005057. The next prime is 51005167. The reversal of 51005125 is 52150015.

It can be written as a sum of positive squares in 4 ways, for example, as 9247681 + 41757444 = 3041^2 + 6462^2 .

It is not a de Polignac number, because 51005125 - 2¹⁷ = 50874053 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 203896 + ... + 204145.

It is an arithmetic number, because the mean of its divisors is an integer number (7956819).

Almost surely, 2^51005125 is an apocalyptic number.

It is an amenable number.

51005125 is a deficient number, since it is larger than the sum of its proper divisors (12649427).

51005125 is an equidigital number, since it uses as much as digits as its factorization.

51005125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408056 (or 408046 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 51005125 is about 7141.7872413003. The cubic root of 51005125 is about 370.8553985384.

It can be divided in two parts, 51005 and 125, that multiplied together give a square (6375625 = 2525²).

The spelling of 51005125 in words is "fifty-one million, five thousand, one hundred twenty-five".