65681232 has 40 divisors (see below), whose sum is σ = 171834240. Its totient is φ = 21615360.

The previous prime is 65681227. The next prime is 65681243. The reversal of 65681232 is 23218656.

It is a junction number, because it is equal to n+sod(n) for n = 65681193 and 65681202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4869 + ... + 12452.

It is an arithmetic number, because the mean of its divisors is an integer number (4295856).

Almost surely, 2^65681232 is an apocalyptic number.

It is an amenable number.

65681232 is an abundant number, since it is smaller than the sum of its proper divisors (106153008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65681232 is a wasteful number, since it uses less digits than its factorization.

65681232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17411 (or 17405 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 65681232 is about 8104.3958442317. The cubic root of 65681232 is about 403.4723366407.

Adding to 65681232 its reverse (23218656), we get a palindrome (88899888).

The spelling of 65681232 in words is "sixty-five million, six hundred eighty-one thousand, two hundred thirty-two".