22043649 has 8 divisors (see below), whose sum is σ = 30075232. Its totient is φ = 14353920.

The previous prime is 22043647. The next prime is 22043653. The reversal of 22043649 is 94634022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22043649 - 2¹ = 22043647 is a prime.

It is a super-2 number, since 2×22043649² = 971844922470402, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22043647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85312 + ... + 85569.

It is an arithmetic number, because the mean of its divisors is an integer number (3759404).

Almost surely, 2^22043649 is an apocalyptic number.

It is an amenable number.

22043649 is a deficient number, since it is larger than the sum of its proper divisors (8031583).

22043649 is a wasteful number, since it uses less digits than its factorization.

22043649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170927.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 22043649 is about 4695.0664532038. The cubic root of 22043649 is about 280.3891230909.

The spelling of 22043649 in words is "twenty-two million, forty-three thousand, six hundred forty-nine".