22301729 has 4 divisors (see below), whose sum is σ = 22417476. Its totient is φ = 22185984.

The previous prime is 22301717. The next prime is 22301749. The reversal of 22301729 is 92710322.

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 12061729 + 10240000 = 3473^2 + 3200^2 .

It is a cyclic number.

It is not a de Polignac number, because 22301729 - 2⁸ = 22301473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22301698 and 22301707.

It is not an unprimeable number, because it can be changed into a prime (22301749) 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, 57584 + ... + 57969.

It is an arithmetic number, because the mean of its divisors is an integer number (5604369).

Almost surely, 2^22301729 is an apocalyptic number.

It is an amenable number.

22301729 is a deficient number, since it is larger than the sum of its proper divisors (115747).

22301729 is a wasteful number, since it uses less digits than its factorization.

22301729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115746.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 22301729 is about 4722.4706457531. The cubic root of 22301729 is about 281.4791157566.

The spelling of 22301729 in words is "twenty-two million, three hundred one thousand, seven hundred twenty-nine".