22221829 has 4 divisors (see below), whose sum is σ = 25396384. Its totient is φ = 19047276.

The previous prime is 22221817. The next prime is 22221833. The reversal of 22221829 is 92812222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22221829 - 2¹¹ = 22219781 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22221797 and 22221806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221889) 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, 1587267 + ... + 1587280.

It is an arithmetic number, because the mean of its divisors is an integer number (6349096).

Almost surely, 2^22221829 is an apocalyptic number.

It is an amenable number.

22221829 is a deficient number, since it is larger than the sum of its proper divisors (3174555).

22221829 is an equidigital number, since it uses as much as digits as its factorization.

22221829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174554.

The product of its digits is 2304, while the sum is 28.

The square root of 22221829 is about 4714.0035002108. The cubic root of 22221829 is about 281.1425634751.

The spelling of 22221829 in words is "twenty-two million, two hundred twenty-one thousand, eight hundred twenty-nine".