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213841 = 281761
BaseRepresentation
bin110100001101010001
3101212100001
4310031101
523320331
64330001
71550305
oct641521
9355301
10213841
11136731
12a3901
1376444
1457d05
1543561
hex34351

213841 has 4 divisors (see below), whose sum is σ = 214884. Its totient is φ = 212800.

The previous prime is 213833. The next prime is 213847. The reversal of 213841 is 148312.

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 can be written as a sum of positive squares in 2 ways, for example, as 50625 + 163216 = 225^2 + 404^2 .

It is a cyclic number.

It is not a de Polignac number, because 213841 - 23 = 213833 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (213847) 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, 100 + ... + 661.

It is an arithmetic number, because the mean of its divisors is an integer number (53721).

2213841 is an apocalyptic number.

It is an amenable number.

213841 is a deficient number, since it is larger than the sum of its proper divisors (1043).

213841 is an equidigital number, since it uses as much as digits as its factorization.

213841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042.

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

The square root of 213841 is about 462.4294540792. The cubic root of 213841 is about 59.7994228197.

The spelling of 213841 in words is "two hundred thirteen thousand, eight hundred forty-one".

Divisors: 1 281 761 213841