201770 has 8 divisors (see below), whose sum is σ = 363204. Its totient is φ = 80704.

The previous prime is 201769. The next prime is 201781. The reversal of 201770 is 77102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 201601 + 169 = 449^2 + 13^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×201770² = 81422265800, which contains 22 as substring.

It is a plaindrome in base 9.

It is a zygodrome in base 9.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 201770.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10079 + ... + 10098.

2²⁰¹⁷⁷⁰ is an apocalyptic number.

201770 is a deficient number, since it is larger than the sum of its proper divisors (161434).

201770 is a wasteful number, since it uses less digits than its factorization.

201770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20184.

The product of its (nonzero) digits is 98, while the sum is 17.

The square root of 201770 is about 449.1881565669. The cubic root of 201770 is about 58.6523653731.

Adding to 201770 its reverse (77102), we get a palindrome (278872).

The spelling of 201770 in words is "two hundred one thousand, seven hundred seventy", and thus it is an iban number.