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BaseRepresentation
bin110100011111101111
3101220221211
4310133233
523340043
64335251
71553614
oct643757
9356854
10215023
11137606
12a4527
1376b43
145850b
1543a9d
hex347ef

215023 has 4 divisors (see below), whose sum is σ = 226360. Its totient is φ = 203688.

The previous prime is 214993. The next prime is 215051. The reversal of 215023 is 320512.

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-215023 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 214994 and 215012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5640 + ... + 5677.

It is an arithmetic number, because the mean of its divisors is an integer number (56590).

2215023 is an apocalyptic number.

215023 is a deficient number, since it is larger than the sum of its proper divisors (11337).

215023 is a wasteful number, since it uses less digits than its factorization.

215023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11336.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 215023 is about 463.7057256494. The cubic root of 215023 is about 59.9094003008.

Adding to 215023 its reverse (320512), we get a palindrome (535535).

The spelling of 215023 in words is "two hundred fifteen thousand, twenty-three".

Divisors: 1 19 11317 215023