51685532 has 12 divisors (see below), whose sum is σ = 90533856. Its totient is φ = 25818720.

The previous prime is 51685523. The next prime is 51685561. The reversal of 51685532 is 23558615.

It is a junction number, because it is equal to n+sod(n) for n = 51685492 and 51685501.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 644 + ... + 10187.

It is an arithmetic number, because the mean of its divisors is an integer number (7544488).

Almost surely, 2^51685532 is an apocalyptic number.

It is an amenable number.

51685532 is a deficient number, since it is larger than the sum of its proper divisors (38848324).

51685532 is a wasteful number, since it uses less digits than its factorization.

51685532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12028 (or 12026 counting only the distinct ones).

The product of its digits is 36000, while the sum is 35.

The square root of 51685532 is about 7189.2650528409. The cubic root of 51685532 is about 372.4971865920.

The spelling of 51685532 in words is "fifty-one million, six hundred eighty-five thousand, five hundred thirty-two".