22249643 has 4 divisors (see below), whose sum is σ = 23961168. Its totient is φ = 20538120.

The previous prime is 22249631. The next prime is 22249649. The reversal of 22249643 is 34694222.

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 22249643 - 2⁸ = 22249387 is a prime.

It is a super-2 number, since 2×22249643² = 990093227254898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22249649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 855743 + ... + 855768.

It is an arithmetic number, because the mean of its divisors is an integer number (5990292).

Almost surely, 2^22249643 is an apocalyptic number.

22249643 is a deficient number, since it is larger than the sum of its proper divisors (1711525).

22249643 is a wasteful number, since it uses less digits than its factorization.

22249643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1711524.

The product of its digits is 20736, while the sum is 32.

The square root of 22249643 is about 4716.9527239522. The cubic root of 22249643 is about 281.2598121350.

The spelling of 22249643 in words is "twenty-two million, two hundred forty-nine thousand, six hundred forty-three".