65631232 has 44 divisors (see below), whose sum is σ = 132645600. Its totient is φ = 32454656.

The previous prime is 65631227. The next prime is 65631253. The reversal of 65631232 is 23213656.

It is a super-2 number, since 2×65631232² = 8614917227675648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65631232.

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, 109269 + ... + 109867.

Almost surely, 2^65631232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65631232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66322800).

65631232 is an abundant number, since it is smaller than the sum of its proper divisors (67014368).

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

65631232 is a wasteful number, since it uses less digits than its factorization.

65631232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 708 counting only the distinct ones).

The product of its digits is 6480, while the sum is 28.

The square root of 65631232 is about 8101.3105112691. The cubic root of 65631232 is about 403.3699292129.

Adding to 65631232 its reverse (23213656), we get a palindrome (88844888).

The spelling of 65631232 in words is "sixty-five million, six hundred thirty-one thousand, two hundred thirty-two".