51887169 has 8 divisors (see below), whose sum is σ = 76869920. Its totient is φ = 34591428.

The previous prime is 51887153. The next prime is 51887191. The reversal of 51887169 is 96178815.

51887169 is a `hidden beast` number, since 518 + 8 + 71 + 69 = 666.

51887169 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 51887169 - 2⁴ = 51887153 is a prime.

It is a super-2 number, since 2×51887169² = 5384556613669122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51887569) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 960847 + ... + 960900.

It is an arithmetic number, because the mean of its divisors is an integer number (9608740).

Almost surely, 2^51887169 is an apocalyptic number.

It is an amenable number.

51887169 is a deficient number, since it is larger than the sum of its proper divisors (24982751).

51887169 is a wasteful number, since it uses less digits than its factorization.

51887169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921756 (or 1921750 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 51887169 is about 7203.2748802194. The cubic root of 51887169 is about 372.9809567481.

The spelling of 51887169 in words is "fifty-one million, eight hundred eighty-seven thousand, one hundred sixty-nine".