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213111103 = 1151185153
BaseRepresentation
bin11001011001111…
…01000100111111
3112212000011110211
430230331010333
5414024023403
633051413251
75165262112
oct1454750477
9485004424
10213111103
11aa328587
125b454227
13351c7c5a
1420436579
1513a9906d
hexcb3d13f

213111103 has 4 divisors (see below), whose sum is σ = 213297408. Its totient is φ = 212924800.

The previous prime is 213111061. The next prime is 213111131. The reversal of 213111103 is 301111312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-213111103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213111203) 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 3 ways as a sum of consecutive naturals, for example, 91426 + ... + 93727.

It is an arithmetic number, because the mean of its divisors is an integer number (53324352).

Almost surely, 2213111103 is an apocalyptic number.

213111103 is a deficient number, since it is larger than the sum of its proper divisors (186305).

213111103 is a wasteful number, since it uses less digits than its factorization.

213111103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186304.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 213111103 is about 14598.3253491625. The cubic root of 213111103 is about 597.3130807736.

Adding to 213111103 its reverse (301111312), we get a palindrome (514222415).

The spelling of 213111103 in words is "two hundred thirteen million, one hundred eleven thousand, one hundred three".

Divisors: 1 1151 185153 213111103