51681884 has 12 divisors (see below), whose sum is σ = 91926408. Its totient is φ = 25417200.

The previous prime is 51681871. The next prime is 51681893. The reversal of 51681884 is 48818615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105662 + ... + 106149.

It is an arithmetic number, because the mean of its divisors is an integer number (7660534).

Almost surely, 2^51681884 is an apocalyptic number.

It is an amenable number.

51681884 is a deficient number, since it is larger than the sum of its proper divisors (40244524).

51681884 is a wasteful number, since it uses less digits than its factorization.

51681884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211876 (or 211874 counting only the distinct ones).

The product of its digits is 61440, while the sum is 41.

The square root of 51681884 is about 7189.0113367556. The cubic root of 51681884 is about 372.4884226842.

The spelling of 51681884 in words is "fifty-one million, six hundred eighty-one thousand, eight hundred eighty-four".