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52181 is a prime number
BaseRepresentation
bin1100101111010101
32122120122
430233111
53132211
61041325
7305063
oct145725
978518
1052181
1136228
1226245
131a99c
1415033
15106db
hexcbd5

52181 has 2 divisors, whose sum is σ = 52182. Its totient is φ = 52180.

The previous prime is 52177. The next prime is 52183. The reversal of 52181 is 18125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34225 + 17956 = 185^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 52181 - 22 = 52177 is a prime.

It is a super-2 number, since 2×521812 = 5445713522, which contains 22 as substring.

Together with 52183, it forms a pair of twin primes.

It is a Chen prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26090 + 26091.

It is an arithmetic number, because the mean of its divisors is an integer number (26091).

252181 is an apocalyptic number.

It is an amenable number.

52181 is a deficient number, since it is larger than the sum of its proper divisors (1).

52181 is an equidigital number, since it uses as much as digits as its factorization.

52181 is an evil number, because the sum of its binary digits is even.

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

The square root of 52181 is about 228.4316090212. The cubic root of 52181 is about 37.3683681182.

The spelling of 52181 in words is "fifty-two thousand, one hundred eighty-one".