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22538 = 259191
BaseRepresentation
bin101100000001010
31010220202
411200022
51210123
6252202
7122465
oct54012
933822
1022538
1115a2a
1211062
13a349
1482dc
156a28
hex580a

22538 has 8 divisors (see below), whose sum is σ = 34560. Its totient is φ = 11020.

The previous prime is 22531. The next prime is 22541. The reversal of 22538 is 83522.

22538 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

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

It is a super-2 number, since 2×225382 = 1015922888, which contains 22 as substring.

It is a d-powerful number, because it can be written as 25 + 28 + 56 + 38 + 82 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22531) by changing a digit.

22538 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23 + ... + 213.

It is an arithmetic number, because the mean of its divisors is an integer number (4320).

222538 is an apocalyptic number.

22538 is a deficient number, since it is larger than the sum of its proper divisors (12022).

22538 is a wasteful number, since it uses less digits than its factorization.

22538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252.

The product of its digits is 480, while the sum is 20.

The square root of 22538 is about 150.1266132303. The cubic root of 22538 is about 28.2469649805.

The spelling of 22538 in words is "twenty-two thousand, five hundred thirty-eight".

Divisors: 1 2 59 118 191 382 11269 22538