22171649 has 8 divisors (see below), whose sum is σ = 22662720. Its totient is φ = 21683376.

The previous prime is 22171637. The next prime is 22171657. The reversal of 22171649 is 94617122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 22171649 - 2²⁰ = 21123073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22171679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25382 + ... + 26240.

It is an arithmetic number, because the mean of its divisors is an integer number (2832840).

Almost surely, 2^22171649 is an apocalyptic number.

It is an amenable number.

22171649 is a deficient number, since it is larger than the sum of its proper divisors (491071).

22171649 is an equidigital number, since it uses as much as digits as its factorization.

22171649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399.

The product of its digits is 6048, while the sum is 32.

The square root of 22171649 is about 4708.6780522775. The cubic root of 22171649 is about 280.9307842339.

The spelling of 22171649 in words is "twenty-two million, one hundred seventy-one thousand, six hundred forty-nine".