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42223165 = 58779629
BaseRepresentation
bin1010000100010…
…0011000111101
32221110011021221
42201010120331
541302120130
64104553341
71021614415
oct241043075
987404257
1042223165
1121919986
1212182851
13899472a
145871645
153a9087a
hex284463d

42223165 has 8 divisors (see below), whose sum is σ = 50730840. Its totient is φ = 33736512.

The previous prime is 42223157. The next prime is 42223169. The reversal of 42223165 is 56132224.

It can be written as a sum of positive squares in 4 ways, for example, as 23921881 + 18301284 = 4891^2 + 4278^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42223165 - 23 = 42223157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42223169) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 430 + ... + 9199.

It is an arithmetic number, because the mean of its divisors is an integer number (6341355).

Almost surely, 242223165 is an apocalyptic number.

It is an amenable number.

42223165 is a deficient number, since it is larger than the sum of its proper divisors (8507675).

42223165 is an equidigital number, since it uses as much as digits as its factorization.

42223165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10511.

The product of its digits is 2880, while the sum is 25.

The square root of 42223165 is about 6497.9354413537. The cubic root of 42223165 is about 348.2172340103.

Adding to 42223165 its reverse (56132224), we get a palindrome (98355389).

The spelling of 42223165 in words is "forty-two million, two hundred twenty-three thousand, one hundred sixty-five".

Divisors: 1 5 877 4385 9629 48145 8444633 42223165