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BaseRepresentation
bin110100001101111111
3101212101202
4310031333
523321022
64330115
71550402
oct641577
9355352
10213887
11136773
12a393b
137647b
1457d39
1543592
hex3437f

213887 has 2 divisors, whose sum is σ = 213888. Its totient is φ = 213886.

The previous prime is 213881. The next prime is 213901. The reversal of 213887 is 788312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-213887 is a prime.

It is a Chen prime.

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 213887.

It is not a weakly prime, because it can be changed into another prime (213881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106943 + 106944.

It is an arithmetic number, because the mean of its divisors is an integer number (106944).

2213887 is an apocalyptic number.

213887 is a deficient number, since it is larger than the sum of its proper divisors (1).

213887 is an equidigital number, since it uses as much as digits as its factorization.

213887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 29.

The square root of 213887 is about 462.4791887210. The cubic root of 213887 is about 59.8037103920.

The spelling of 213887 in words is "two hundred thirteen thousand, eight hundred eighty-seven".