65571228 has 48 divisors (see below), whose sum is σ = 172348960. Its totient is φ = 21555072.

The previous prime is 65571217. The next prime is 65571241. The reversal of 65571228 is 82217556.

It is a happy number.

65571228 is a `hidden beast` number, since 65 + 571 + 2 + 28 = 666.

65571228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×65571228³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 65571192 and 65571201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3726 + ... + 12042.

Almost surely, 2^65571228 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 65571228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86174480).

65571228 is an abundant number, since it is smaller than the sum of its proper divisors (106777732).

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

65571228 is a wasteful number, since it uses less digits than its factorization.

65571228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8403 (or 8395 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 65571228 is about 8097.6063129792. The cubic root of 65571228 is about 403.2469634214.

The spelling of 65571228 in words is "sixty-five million, five hundred seventy-one thousand, two hundred twenty-eight".