51147873 has 12 divisors (see below), whose sum is σ = 84434688. Its totient is φ = 29227320.

The previous prime is 51147847. The next prime is 51147893. The reversal of 51147873 is 37874115.

51147873 is a `hidden beast` number, since 511 + 4 + 78 + 73 = 666.

It is not a de Polignac number, because 51147873 - 2⁵ = 51147841 is a prime.

It is a super-2 number, since 2×51147873² = 5232209824848258, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (51147823) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 405873 + ... + 405998.

It is an arithmetic number, because the mean of its divisors is an integer number (7036224).

Almost surely, 2^51147873 is an apocalyptic number.

It is an amenable number.

51147873 is a deficient number, since it is larger than the sum of its proper divisors (33286815).

51147873 is a wasteful number, since it uses less digits than its factorization.

51147873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811884 (or 811881 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 51147873 is about 7151.7741155604. The cubic root of 51147873 is about 371.2010471794.

It can be divided in two parts, 511 and 47873, that added together give a palindrome (48384).

The spelling of 51147873 in words is "fifty-one million, one hundred forty-seven thousand, eight hundred seventy-three".