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195881 = 727983
BaseRepresentation
bin101111110100101001
3100221200212
4233310221
522232011
64110505
71444040
oct576451
9327625
10195881
11124194
1295435
136b20a
1451557
153d08b
hex2fd29

195881 has 4 divisors (see below), whose sum is σ = 223872. Its totient is φ = 167892.

The previous prime is 195869. The next prime is 195883. The reversal of 195881 is 188591.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 195881 - 26 = 195817 is a prime.

It is a super-2 number, since 2×1958812 = 76738732322, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 195881.

It is not an unprimeable number, because it can be changed into a prime (195883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13985 + ... + 13998.

It is an arithmetic number, because the mean of its divisors is an integer number (55968).

2195881 is an apocalyptic number.

It is an amenable number.

195881 is a deficient number, since it is larger than the sum of its proper divisors (27991).

195881 is an equidigital number, since it uses as much as digits as its factorization.

195881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27990.

The product of its digits is 2880, while the sum is 32.

The square root of 195881 is about 442.5844552173. The cubic root of 195881 is about 58.0760990798.

The spelling of 195881 in words is "one hundred ninety-five thousand, eight hundred eighty-one".

Divisors: 1 7 27983 195881