22449491 has 4 divisors (see below), whose sum is σ = 23056272. Its totient is φ = 21842712.

The previous prime is 22449467. The next prime is 22449499. The reversal of 22449491 is 19494422.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22449491 is a prime.

It is a super-3 number, since 3×22449491³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22449499) 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, 303335 + ... + 303408.

It is an arithmetic number, because the mean of its divisors is an integer number (5764068).

Almost surely, 2^22449491 is an apocalyptic number.

22449491 is a deficient number, since it is larger than the sum of its proper divisors (606781).

22449491 is an equidigital number, since it uses as much as digits as its factorization.

22449491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606780.

The product of its digits is 20736, while the sum is 35.

The square root of 22449491 is about 4738.0893828631. The cubic root of 22449491 is about 282.0994024438.

The spelling of 22449491 in words is "twenty-two million, four hundred forty-nine thousand, four hundred ninety-one".