22220549 has 8 divisors (see below), whose sum is σ = 23969400. Its totient is φ = 20477376.

The previous prime is 22220537. The next prime is 22220603. The reversal of 22220549 is 94502222.

It can be written as a sum of positive squares in 4 ways, for example, as 6076225 + 16144324 = 2465^2 + 4018^2 .

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 22220549 - 2⁴ = 22220533 is a prime.

It is a super-2 number, since 2×22220549² = 987505595722802, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10427 + ... + 12375.

It is an arithmetic number, because the mean of its divisors is an integer number (2996175).

Almost surely, 2^22220549 is an apocalyptic number.

It is an amenable number.

22220549 is a deficient number, since it is larger than the sum of its proper divisors (1748851).

22220549 is a wasteful number, since it uses less digits than its factorization.

22220549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2839.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 22220549 is about 4713.8677325525. The cubic root of 22220549 is about 281.1371653387.

The spelling of 22220549 in words is "twenty-two million, two hundred twenty thousand, five hundred forty-nine".