22091649 has 16 divisors (see below), whose sum is σ = 30616320. Its totient is φ = 14152320.

The previous prime is 22091647. The next prime is 22091677. The reversal of 22091649 is 94619022.

It is not a de Polignac number, because 22091649 - 2¹ = 22091647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22091647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23109 + ... + 24045.

It is an arithmetic number, because the mean of its divisors is an integer number (1913520).

Almost surely, 2^22091649 is an apocalyptic number.

22091649 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

22091649 is a deficient number, since it is larger than the sum of its proper divisors (8524671).

22091649 is a wasteful number, since it uses less digits than its factorization.

22091649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 22091649 is about 4700.1754222582. The cubic root of 22091649 is about 280.5924911292.

The spelling of 22091649 in words is "twenty-two million, ninety-one thousand, six hundred forty-nine".