51887133 has 6 divisors (see below), whose sum is σ = 74948094. Its totient is φ = 34591416.

The previous prime is 51887123. The next prime is 51887153. The reversal of 51887133 is 33178815.

51887133 is a `hidden beast` number, since 518 + 8 + 7 + 133 = 666.

It can be written as a sum of positive squares in only one way, i.e., 50381604 + 1505529 = 7098^2 + 1227^2 .

It is not a de Polignac number, because 51887133 - 2²¹ = 49789981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51887113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2882610 + ... + 2882627.

It is an arithmetic number, because the mean of its divisors is an integer number (12491349).

Almost surely, 2^51887133 is an apocalyptic number.

It is an amenable number.

51887133 is a deficient number, since it is larger than the sum of its proper divisors (23060961).

51887133 is a wasteful number, since it uses less digits than its factorization.

51887133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5765243 (or 5765240 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 51887133 is about 7203.2723813556. The cubic root of 51887133 is about 372.9808704884.

It can be divided in two parts, 5188 and 7133, that added together give a palindrome (12321).

The spelling of 51887133 in words is "fifty-one million, eight hundred eighty-seven thousand, one hundred thirty-three".