22122831985 has 4 divisors (see below), whose sum is σ = 26547398388. Its totient is φ = 17698265584.

The previous prime is 22122831979. The next prime is 22122832009. The reversal of 22122831985 is 58913822122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16182892944 + 5939939041 = 127212^2 + 77071^2 .

It is a cyclic number.

It is not a de Polignac number, because 22122831985 - 2¹⁵ = 22122799217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2212283194 + ... + 2212283203.

It is an arithmetic number, because the mean of its divisors is an integer number (6636849597).

Almost surely, 2^22122831985 is an apocalyptic number.

It is an amenable number.

22122831985 is a deficient number, since it is larger than the sum of its proper divisors (4424566403).

22122831985 is an equidigital number, since it uses as much as digits as its factorization.

22122831985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4424566402.

The product of its digits is 138240, while the sum is 43.

The spelling of 22122831985 in words is "twenty-two billion, one hundred twenty-two million, eight hundred thirty-one thousand, nine hundred eighty-five".