51644875 has 8 divisors (see below), whose sum is σ = 64452960. Its totient is φ = 41315800.

The previous prime is 51644863. The next prime is 51644881. The reversal of 51644875 is 57844615.

It is not a de Polignac number, because 51644875 - 2¹¹ = 51642827 is a prime.

It is a super-2 number, since 2×51644875² = 5334386227531250, which contains 22 as substring.

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, 206455 + ... + 206704.

It is an arithmetic number, because the mean of its divisors is an integer number (8056620).

Almost surely, 2^51644875 is an apocalyptic number.

51644875 is a deficient number, since it is larger than the sum of its proper divisors (12808085).

51644875 is an equidigital number, since it uses as much as digits as its factorization.

51644875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413174 (or 413164 counting only the distinct ones).

The product of its digits is 134400, while the sum is 40.

The square root of 51644875 is about 7186.4368778971. The cubic root of 51644875 is about 372.3994894203.

The spelling of 51644875 in words is "fifty-one million, six hundred forty-four thousand, eight hundred seventy-five".