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81226 = 2172389
BaseRepresentation
bin10011110101001010
311010102101
4103311022
510044401
61424014
7455545
oct236512
9133371
1081226
1156032
123b00a
132ac82
142185c
1519101
hex13d4a

81226 has 8 divisors (see below), whose sum is σ = 129060. Its totient is φ = 38208.

The previous prime is 81223. The next prime is 81233. The reversal of 81226 is 62218.

It is a happy number.

It is a Cunningham number, because it is equal to 2852+1.

It can be written as a sum of positive squares in 2 ways, for example, as 81225 + 1 = 285^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (81223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1161 + ... + 1228.

281226 is an apocalyptic number.

81226 is a deficient number, since it is larger than the sum of its proper divisors (47834).

81226 is a wasteful number, since it uses less digits than its factorization.

81226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408.

The product of its digits is 192, while the sum is 19.

The square root of 81226 is about 285.0017543806. The cubic root of 81226 is about 43.3076902853.

Adding to 81226 its product of digits (192), we get a palindrome (81418).

It can be divided in two parts, 8122 and 6, that added together give a triangular number (8128 = T127).

The spelling of 81226 in words is "eighty-one thousand, two hundred twenty-six".

Divisors: 1 2 17 34 2389 4778 40613 81226