22222111985 has 8 divisors (see below), whose sum is σ = 26695244520. Its totient is φ = 17758549504.

The previous prime is 22222111973. The next prime is 22222111991. The reversal of 22222111985 is 58911122222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2003547121 + 20218564864 = 44761^2 + 142192^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22222111985 - 2¹⁸ = 22221849841 is a prime.

It is a super-2 number, since 2×22222111985² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2387402 + ... + 2396691.

It is an arithmetic number, because the mean of its divisors is an integer number (3336905565).

Almost surely, 2^22222111985 is an apocalyptic number.

It is an amenable number.

22222111985 is a deficient number, since it is larger than the sum of its proper divisors (4473132535).

22222111985 is an equidigital number, since it uses as much as digits as its factorization.

22222111985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4785027.

The product of its digits is 11520, while the sum is 35.

The spelling of 22222111985 in words is "twenty-two billion, two hundred twenty-two million, one hundred eleven thousand, nine hundred eighty-five".