51125265 has 12 divisors (see below), whose sum is σ = 88617204. Its totient is φ = 27266784.

The previous prime is 51125201. The next prime is 51125279. The reversal of 51125265 is 56252115.

It can be written as a sum of positive squares in 2 ways, for example, as 7683984 + 43441281 = 2772^2 + 6591^2 .

It is not a de Polignac number, because 51125265 - 2⁶ = 51125201 is a prime.

It is a super-2 number, since 2×51125265² = 5227585442640450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 568014 + ... + 568103.

It is an arithmetic number, because the mean of its divisors is an integer number (7384767).

Almost surely, 2^51125265 is an apocalyptic number.

It is an amenable number.

51125265 is a deficient number, since it is larger than the sum of its proper divisors (37491939).

51125265 is a wasteful number, since it uses less digits than its factorization.

51125265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136128 (or 1136125 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 51125265 is about 7150.1933540290. The cubic root of 51125265 is about 371.1463472830.

It can be divided in two parts, 51 and 125265, that added together give a square (125316 = 354²).

The spelling of 51125265 in words is "fifty-one million, one hundred twenty-five thousand, two hundred sixty-five".