22138222145 has 8 divisors (see below), whose sum is σ = 28609394856. Its totient is φ = 16348225536.

The previous prime is 22138222133. The next prime is 22138222147. The reversal of 22138222145 is 54122283122.

It can be written as a sum of positive squares in 4 ways, for example, as 812877121 + 21325345024 = 28511^2 + 146032^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22138222145 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22138222147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170293952 + ... + 170294081.

It is an arithmetic number, because the mean of its divisors is an integer number (3576174357).

Almost surely, 2^22138222145 is an apocalyptic number.

It is an amenable number.

22138222145 is a deficient number, since it is larger than the sum of its proper divisors (6471172711).

22138222145 is a wasteful number, since it uses less digits than its factorization.

22138222145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340588051.

The product of its digits is 15360, while the sum is 32.

The spelling of 22138222145 in words is "twenty-two billion, one hundred thirty-eight million, two hundred twenty-two thousand, one hundred forty-five".