22220261 has 8 divisors (see below), whose sum is σ = 25456704. Its totient is φ = 18999360.

The previous prime is 22220257. The next prime is 22220267. The reversal of 22220261 is 16202222.

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 22220261 - 2² = 22220257 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220267) by changing a digit.

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, 635 + ... + 6696.

It is an arithmetic number, because the mean of its divisors is an integer number (3182088).

Almost surely, 2^22220261 is an apocalyptic number.

It is an amenable number.

22220261 is a deficient number, since it is larger than the sum of its proper divisors (3236443).

22220261 is an equidigital number, since it uses as much as digits as its factorization.

22220261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7771.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 22220261 is about 4713.8371842905. The cubic root of 22220261 is about 281.1359507295.

Adding to 22220261 its reverse (16202222), we get a palindrome (38422483).

The spelling of 22220261 in words is "twenty-two million, two hundred twenty thousand, two hundred sixty-one".