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22185142 = 272226379
BaseRepresentation
bin101010010100…
…0010010110110
31112202010021221
41110220102312
521134411032
62111300554
7356366500
oct124502266
945663257
1022185142
1111583031
12751a75a
134799c05
142d36d70
151e33597
hex15284b6

22185142 has 12 divisors (see below), whose sum is σ = 38710980. Its totient is φ = 9507876.

The previous prime is 22185139. The next prime is 22185167. The reversal of 22185142 is 24158122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 113092 + ... + 113287.

It is an arithmetic number, because the mean of its divisors is an integer number (3225915).

Almost surely, 222185142 is an apocalyptic number.

22185142 is a deficient number, since it is larger than the sum of its proper divisors (16525838).

22185142 is a wasteful number, since it uses less digits than its factorization.

22185142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226395 (or 226388 counting only the distinct ones).

The product of its digits is 1280, while the sum is 25.

The square root of 22185142 is about 4710.1106144124. The cubic root of 22185142 is about 280.9877613579.

The spelling of 22185142 in words is "twenty-two million, one hundred eighty-five thousand, one hundred forty-two".

Divisors: 1 2 7 14 49 98 226379 452758 1584653 3169306 11092571 22185142