22009249 has 4 divisors (see below), whose sum is σ = 22521136. Its totient is φ = 21497364.

The previous prime is 22009241. The next prime is 22009261. The reversal of 22009249 is 94290022.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94290022 = 2 ⋅47145011.

It is a cyclic number.

It is not a de Polignac number, because 22009249 - 2³ = 22009241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22009241) 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, 255879 + ... + 255964.

It is an arithmetic number, because the mean of its divisors is an integer number (5630284).

Almost surely, 2^22009249 is an apocalyptic number.

It is an amenable number.

22009249 is a deficient number, since it is larger than the sum of its proper divisors (511887).

22009249 is an equidigital number, since it uses as much as digits as its factorization.

22009249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511886.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 22009249 is about 4691.4016029328. The cubic root of 22009249 is about 280.2431943244.

It can be divided in two parts, 2200 and 9249, that added together give a square (11449 = 107²).

The spelling of 22009249 in words is "twenty-two million, nine thousand, two hundred forty-nine".