22285691 has 4 divisors (see below), whose sum is σ = 23596632. Its totient is φ = 20974752.

The previous prime is 22285619. The next prime is 22285699. The reversal of 22285691 is 19658222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22285691 - 2¹⁰ = 22284667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22285699) 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 3 ways as a sum of consecutive naturals, for example, 655445 + ... + 655478.

It is an arithmetic number, because the mean of its divisors is an integer number (5899158).

Almost surely, 2^22285691 is an apocalyptic number.

22285691 is a deficient number, since it is larger than the sum of its proper divisors (1310941).

22285691 is a wasteful number, since it uses less digits than its factorization.

22285691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310940.

The product of its digits is 17280, while the sum is 35.

The square root of 22285691 is about 4720.7722885138. The cubic root of 22285691 is about 281.4116255537.

The spelling of 22285691 in words is "twenty-two million, two hundred eighty-five thousand, six hundred ninety-one".