22049 has 4 divisors (see below), whose sum is σ = 23364.
Its totient is φ = 20736.
The previous prime is 22039. The next prime is 22051. The reversal of 22049 is 94022.
22049 = 72 + 82 + ... + 402.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 20449 + 1600 = 143^2 + 40^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-22049 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 1297 = 22049 / (2 + 2 + 0 + 4 + 9).
It is a Duffinian number.
It is a plaindrome in base 15.
It is not an unprimeable number, because it can be changed into a prime (22039) 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, 632 + ... + 665.
It is an arithmetic number, because the mean of its divisors is an integer number (5841).
222049 is an apocalyptic number.
It is an amenable number.
22049 is a deficient number, since it is larger than the sum of its proper divisors (1315).
22049 is a wasteful number, since it uses less digits than its factorization.
22049 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1314.
The product of its (nonzero) digits is 144, while the sum is 17.
The square root of 22049 is about 148.4890568358.
The cubic root of 22049 is about 28.0411809002.
The spelling of 22049 in words is "twenty-two thousand, forty-nine".