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81232 = 245077
BaseRepresentation
bin10011110101010000
311010102121
4103311100
510044412
61424024
7455554
oct236520
9133377
1081232
1156038
123b014
132ac88
1421864
1519107
hex13d50

81232 has 10 divisors (see below), whose sum is σ = 157418. Its totient is φ = 40608.

The previous prime is 81223. The next prime is 81233. The reversal of 81232 is 23218.

It can be divided in two parts, 81 and 232, that added together give a palindrome (313).

It is a happy number.

81232 is nontrivially palindromic in base 7.

It can be written as a sum of positive squares in only one way, i.e., 80656 + 576 = 284^2 + 24^2 .

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 5077 = 81232 / (8 + 1 + 2 + 3 + 2).

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2523 + ... + 2554.

281232 is an apocalyptic number.

It is an amenable number.

81232 is a deficient number, since it is larger than the sum of its proper divisors (76186).

81232 is a wasteful number, since it uses less digits than its factorization.

81232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5085 (or 5079 counting only the distinct ones).

The product of its digits is 96, while the sum is 16.

The square root of 81232 is about 285.0122804372. The cubic root of 81232 is about 43.3087566095.

The spelling of 81232 in words is "eighty-one thousand, two hundred thirty-two".

Divisors: 1 2 4 8 16 5077 10154 20308 40616 81232