22355549 has 4 divisors (see below), whose sum is σ = 23126460. Its totient is φ = 21584640.

The previous prime is 22355519. The next prime is 22355551. The reversal of 22355549 is 94555322.

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 4020025 + 18335524 = 2005^2 + 4282^2 .

It is a cyclic number.

It is not a de Polignac number, because 22355549 - 2⁸ = 22355293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22355519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385412 + ... + 385469.

It is an arithmetic number, because the mean of its divisors is an integer number (5781615).

Almost surely, 2^22355549 is an apocalyptic number.

22355549 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

22355549 is a deficient number, since it is larger than the sum of its proper divisors (770911).

22355549 is an equidigital number, since it uses as much as digits as its factorization.

22355549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770910.

The product of its digits is 54000, while the sum is 35.

The square root of 22355549 is about 4728.1655004875. The cubic root of 22355549 is about 281.7053618317.

The spelling of 22355549 in words is "twenty-two million, three hundred fifty-five thousand, five hundred forty-nine".