22065231213 has 6 divisors (see below), whose sum is σ = 31872000654. Its totient is φ = 14710154136.

The previous prime is 22065231143. The next prime is 22065231257. The reversal of 22065231213 is 31213256022.

It is a happy number.

22065231213 is a `hidden beast` number, since 2 + 2 + 0 + 652 + 3 + 1 + 2 + 1 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21720274884 + 344956329 = 147378^2 + 18573^2 .

It is not a de Polignac number, because 22065231213 - 2¹³ = 22065223021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22065231913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1225846170 + ... + 1225846187.

It is an arithmetic number, because the mean of its divisors is an integer number (5312000109).

Almost surely, 2^22065231213 is an apocalyptic number.

It is an amenable number.

22065231213 is a deficient number, since it is larger than the sum of its proper divisors (9806769441).

22065231213 is a wasteful number, since it uses less digits than its factorization.

22065231213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451692363 (or 2451692360 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 22065231213 its reverse (31213256022), we get a palindrome (53278487235).

The spelling of 22065231213 in words is "twenty-two billion, sixty-five million, two hundred thirty-one thousand, two hundred thirteen".