201644 has 6 divisors (see below), whose sum is σ = 352884. Its totient is φ = 100820.

The previous prime is 201629. The next prime is 201653. The reversal of 201644 is 446102.

201644 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25202 + ... + 25209.

It is an arithmetic number, because the mean of its divisors is an integer number (58814).

2²⁰¹⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

201644 is a deficient number, since it is larger than the sum of its proper divisors (151240).

201644 is a wasteful number, since it uses less digits than its factorization.

201644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50415 (or 50413 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 201644 is about 449.0478816340. The cubic root of 201644 is about 58.6401538833.

Adding to 201644 its reverse (446102), we get a palindrome (647746).

It can be divided in two parts, 20164 and 4, that multiplied together give a square (80656 = 284²).

The spelling of 201644 in words is "two hundred one thousand, six hundred forty-four".