22229729 has 8 divisors (see below), whose sum is σ = 22666848. Its totient is φ = 21795840.

The previous prime is 22229719. The next prime is 22229771. The reversal of 22229729 is 92792222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22229729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22229719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16574 + ... + 17864.

It is an arithmetic number, because the mean of its divisors is an integer number (2833356).

Almost surely, 2^22229729 is an apocalyptic number.

It is an amenable number.

22229729 is a deficient number, since it is larger than the sum of its proper divisors (437119).

22229729 is a wasteful number, since it uses less digits than its factorization.

22229729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615.

The product of its digits is 18144, while the sum is 35.

The square root of 22229729 is about 4714.8413547011. The cubic root of 22229729 is about 281.1758755112.

The spelling of 22229729 in words is "twenty-two million, two hundred twenty-nine thousand, seven hundred twenty-nine".