22061 has 4 divisors (see below), whose sum is σ = 23772.
Its totient is φ = 20352.
The previous prime is 22051. The next prime is 22063. The reversal of 22061 is 16022.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16022 = 2 ⋅8011.
It can be written as a sum of positive squares in 2 ways, for example, as 13225 + 8836 = 115^2 + 94^2
It is a cyclic number.
It is not a de Polignac number, because 22061 - 26 = 21997 is a prime.
It is a magnanimous number.
It is a Duffinian number.
It is a Curzon number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (22063) 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, 836 + ... + 861.
It is an arithmetic number, because the mean of its divisors is an integer number (5943).
222061 is an apocalyptic number.
It is an amenable number.
22061 is a deficient number, since it is larger than the sum of its proper divisors (1711).
22061 is a wasteful number, since it uses less digits than its factorization.
22061 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1710.
The product of its (nonzero) digits is 24, while the sum is 11.
The square root of 22061 is about 148.5294583576.
The cubic root of 22061 is about 28.0462670439.
Adding to 22061 its reverse (16022), we get a palindrome (38083).
The spelling of 22061 in words is "twenty-two thousand, sixty-one".