22506449 has 4 divisors (see below), whose sum is σ = 25721664. Its totient is φ = 19291236.

The previous prime is 22506437. The next prime is 22506479. The reversal of 22506449 is 94460522.

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 22506449 - 2¹² = 22502353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22506479) 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, 1607597 + ... + 1607610.

It is an arithmetic number, because the mean of its divisors is an integer number (6430416).

Almost surely, 2^22506449 is an apocalyptic number.

It is an amenable number.

22506449 is a deficient number, since it is larger than the sum of its proper divisors (3215215).

22506449 is an equidigital number, since it uses as much as digits as its factorization.

22506449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3215214.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 22506449 is about 4744.0962258369. The cubic root of 22506449 is about 282.3377782716.

The spelling of 22506449 in words is "twenty-two million, five hundred six thousand, four hundred forty-nine".