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216026 = 2108013
BaseRepresentation
bin110100101111011010
3101222022222
4310233122
523403101
64344042
71556546
oct645732
9358288
10216026
11138338
12a5022
1377435
1458a26
154401b
hex34bda

216026 has 4 divisors (see below), whose sum is σ = 324042. Its totient is φ = 108012.

The previous prime is 216023. The next prime is 216037. The reversal of 216026 is 620612.

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

It can be written as a sum of positive squares in only one way, i.e., 160801 + 55225 = 401^2 + 235^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 215995 and 216013.

It is not an unprimeable number, because it can be changed into a prime (216023) 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 as a sum of consecutive naturals, namely, 54005 + ... + 54008.

216026 is a Friedman number, since it can be written as 60^(2+1)+26, using all its digits and the basic arithmetic operations.

2216026 is an apocalyptic number.

216026 is a deficient number, since it is larger than the sum of its proper divisors (108016).

216026 is a wasteful number, since it uses less digits than its factorization.

216026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108015.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 216026 is about 464.7859722496. The cubic root of 216026 is about 60.0024073108.

Adding to 216026 its reverse (620612), we get a palindrome (836638).

The spelling of 216026 in words is "two hundred sixteen thousand, twenty-six".

Divisors: 1 2 108013 216026