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22158 = 2321231
BaseRepresentation
bin101011010001110
31010101200
411122032
51202113
6250330
7121413
oct53216
933350
1022158
1115714
12109a6
13a116
14810a
156873
hex568e

22158 has 12 divisors (see below), whose sum is σ = 48048. Its totient is φ = 7380.

The previous prime is 22157. The next prime is 22159. The reversal of 22158 is 85122.

It is an interprime number because it is at equal distance from previous prime (22157) and next prime (22159).

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1231 = 22158 / (2 + 2 + 1 + 5 + 8).

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 22158.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 22158.

It is not an unprimeable number, because it can be changed into a prime (22153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 598 + ... + 633.

It is an arithmetic number, because the mean of its divisors is an integer number (4004).

222158 is an apocalyptic number.

22158 is an abundant number, since it is smaller than the sum of its proper divisors (25890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22158 is a wasteful number, since it uses less digits than its factorization.

22158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239 (or 1236 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 22158 is about 148.8556347607. The cubic root of 22158 is about 28.0873124842.

The spelling of 22158 in words is "twenty-two thousand, one hundred fifty-eight".

Divisors: 1 2 3 6 9 18 1231 2462 3693 7386 11079 22158