65643222 has 32 divisors (see below), whose sum is σ = 139594752. Its totient is φ = 20507264.

The previous prime is 65643131. The next prime is 65643229. The reversal of 65643222 is 22234656.

It is a self number, because there is not a number n which added to its sum of digits gives 65643222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65643229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25603 + ... + 28049.

It is an arithmetic number, because the mean of its divisors is an integer number (4362336).

Almost surely, 2^65643222 is an apocalyptic number.

65643222 is an abundant number, since it is smaller than the sum of its proper divisors (73951530).

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

65643222 is a wasteful number, since it uses less digits than its factorization.

65643222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732.

The product of its digits is 17280, while the sum is 30.

The square root of 65643222 is about 8102.0504812054. The cubic root of 65643222 is about 403.3944912535.

Adding to 65643222 its reverse (22234656), we get a palindrome (87877878).

The spelling of 65643222 in words is "sixty-five million, six hundred forty-three thousand, two hundred twenty-two".