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213111163 = 1973153649
BaseRepresentation
bin11001011001111…
…01000101111011
3112212000011120001
430230331011323
5414024024123
633051413431
75165262226
oct1454750573
9485004501
10213111163
11aa328631
125b454277
13351c7ca5
14204365bd
1513a990ad
hexcb3d17b

213111163 has 8 divisors (see below), whose sum is σ = 227402000. Its totient is φ = 199127808.

The previous prime is 213111161. The next prime is 213111181. The reversal of 213111163 is 361111312.

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 213111163 - 21 = 213111161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213111163.

It is not an unprimeable number, because it can be changed into a prime (213111161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75438 + ... + 78211.

It is an arithmetic number, because the mean of its divisors is an integer number (28425250).

It is a Poulet number, since it divides 2213111162-1.

Almost surely, 2213111163 is an apocalyptic number.

213111163 is a deficient number, since it is larger than the sum of its proper divisors (14290837).

213111163 is a wasteful number, since it uses less digits than its factorization.

213111163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153741.

The product of its digits is 108, while the sum is 19.

The square root of 213111163 is about 14598.3274041926. The cubic root of 213111163 is about 597.3131368300.

Adding to 213111163 its reverse (361111312), we get a palindrome (574222475).

The spelling of 213111163 in words is "two hundred thirteen million, one hundred eleven thousand, one hundred sixty-three".

Divisors: 1 19 73 1387 153649 2919331 11216377 213111163