201655 has 8 divisors (see below), whose sum is σ = 249984. Its totient is φ = 156000.

The previous prime is 201653. The next prime is 201661. The reversal of 201655 is 556102.

It is a happy number.

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

It is not a de Polignac number, because 201655 - 2¹ = 201653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201653) 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 7 ways as a sum of consecutive naturals, for example, 496 + ... + 805.

It is an arithmetic number, because the mean of its divisors is an integer number (31248).

2²⁰¹⁶⁵⁵ is an apocalyptic number.

201655 is a deficient number, since it is larger than the sum of its proper divisors (48329).

201655 is a wasteful number, since it uses less digits than its factorization.

201655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 201655 is about 449.0601296040. The cubic root of 201655 is about 58.6412201683.

Adding to 201655 its reverse (556102), we get a palindrome (757757).

The spelling of 201655 in words is "two hundred one thousand, six hundred fifty-five".