51685132 has 6 divisors (see below), whose sum is σ = 90448988. Its totient is φ = 25842564.

The previous prime is 51685129. The next prime is 51685141. The reversal of 51685132 is 23158615.

It is a junction number, because it is equal to n+sod(n) for n = 51685094 and 51685103.

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 as a sum of consecutive naturals, namely, 6460638 + ... + 6460645.

Almost surely, 2^51685132 is an apocalyptic number.

It is an amenable number.

51685132 is a deficient number, since it is larger than the sum of its proper divisors (38763856).

51685132 is a wasteful number, since it uses less digits than its factorization.

51685132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12921287 (or 12921285 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 51685132 is about 7189.2372335318. The cubic root of 51685132 is about 372.4962256573.

The spelling of 51685132 in words is "fifty-one million, six hundred eighty-five thousand, one hundred thirty-two".