22281225985 has 4 divisors (see below), whose sum is σ = 26737471188. Its totient is φ = 17824980784.

The previous prime is 22281225979. The next prime is 22281225997. The reversal of 22281225985 is 58952218222.

It is a happy number.

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 6744351376 + 15536874609 = 82124^2 + 124647^2 .

It is a cyclic number.

It is not a de Polignac number, because 22281225985 - 2³ = 22281225977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2228122594 + ... + 2228122603.

It is an arithmetic number, because the mean of its divisors is an integer number (6684367797).

Almost surely, 2^22281225985 is an apocalyptic number.

It is an amenable number.

22281225985 is a deficient number, since it is larger than the sum of its proper divisors (4456245203).

22281225985 is an equidigital number, since it uses as much as digits as its factorization.

22281225985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4456245202.

The product of its digits is 460800, while the sum is 46.

The spelling of 22281225985 in words is "twenty-two billion, two hundred eighty-one million, two hundred twenty-five thousand, nine hundred eighty-five".