22149445 has 8 divisors (see below), whose sum is σ = 26666136. Its totient is φ = 17661696.

The previous prime is 22149433. The next prime is 22149451. The reversal of 22149445 is 54494122.

It can be written as a sum of positive squares in 4 ways, for example, as 181476 + 21967969 = 426^2 + 4687^2 .

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 22149445 - 2²¹ = 20052293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5512 + ... + 8641.

It is an arithmetic number, because the mean of its divisors is an integer number (3333267).

Almost surely, 2^22149445 is an apocalyptic number.

It is an amenable number.

22149445 is a deficient number, since it is larger than the sum of its proper divisors (4516691).

22149445 is a wasteful number, since it uses less digits than its factorization.

22149445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14471.

The product of its digits is 11520, while the sum is 31.

The square root of 22149445 is about 4706.3196873991. The cubic root of 22149445 is about 280.8369726792.

The spelling of 22149445 in words is "twenty-two million, one hundred forty-nine thousand, four hundred forty-five".