51128275 has 24 divisors (see below), whose sum is σ = 69973200. Its totient is φ = 36748800.

The previous prime is 51128267. The next prime is 51128281. The reversal of 51128275 is 57282115.

51128275 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51128275 - 2³ = 51128267 is a prime.

It is a super-2 number, since 2×51128275² = 5228201008951250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23431 + ... + 25519.

It is an arithmetic number, because the mean of its divisors is an integer number (2915550).

Almost surely, 2^51128275 is an apocalyptic number.

51128275 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51128275 is a deficient number, since it is larger than the sum of its proper divisors (18844925).

51128275 is a wasteful number, since it uses less digits than its factorization.

51128275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2199 (or 2194 counting only the distinct ones).

The product of its digits is 5600, while the sum is 31.

The square root of 51128275 is about 7150.4038347495. The cubic root of 51128275 is about 371.1536308872.

The spelling of 51128275 in words is "fifty-one million, one hundred twenty-eight thousand, two hundred seventy-five".