65217222222 has 32 divisors (see below), whose sum is σ = 135545702400. Its totient is φ = 20896611360.

The previous prime is 65217222197. The next prime is 65217222229. The reversal of 65217222222 is 22222271256.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65217222229) 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, 1148898 + ... + 1204325.

It is an arithmetic number, because the mean of its divisors is an integer number (4235803200).

Almost surely, 2^65217222222 is an apocalyptic number.

65217222222 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

65217222222 is an abundant number, since it is smaller than the sum of its proper divisors (70328480178).

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

65217222222 is a wasteful number, since it uses less digits than its factorization.

65217222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353408.

The product of its digits is 26880, while the sum is 33.

Adding to 65217222222 its reverse (22222271256), we get a palindrome (87439493478).

The spelling of 65217222222 in words is "sixty-five billion, two hundred seventeen million, two hundred twenty-two thousand, two hundred twenty-two".