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82151 = 113727
BaseRepresentation
bin10100000011100111
311011200122
4110003213
510112101
61432155
7461336
oct240347
9134618
1082151
11567a3
123b65b
132b514
1421d1d
151951b
hex140e7

82151 has 4 divisors (see below), whose sum is σ = 82992. Its totient is φ = 81312.

The previous prime is 82141. The next prime is 82153. The reversal of 82151 is 15128.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-82151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82153) 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, 251 + ... + 476.

It is an arithmetic number, because the mean of its divisors is an integer number (20748).

282151 is an apocalyptic number.

82151 is a deficient number, since it is larger than the sum of its proper divisors (841).

82151 is a wasteful number, since it uses less digits than its factorization.

82151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840.

The product of its digits is 80, while the sum is 17.

The square root of 82151 is about 286.6199574349. The cubic root of 82151 is about 43.4714658511.

Adding to 82151 its reverse (15128), we get a palindrome (97279).

The spelling of 82151 in words is "eighty-two thousand, one hundred fifty-one".

Divisors: 1 113 727 82151