201569 has 8 divisors (see below), whose sum is σ = 217728. Its totient is φ = 185920.

The previous prime is 201557. The next prime is 201577. The reversal of 201569 is 965102.

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

It is a cyclic number.

It is not a de Polignac number, because 201569 - 2¹⁶ = 136033 is a prime.

It is a super-2 number, since 2×201569² = 81260123522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1124 + ... + 1290.

It is an arithmetic number, because the mean of its divisors is an integer number (27216).

2²⁰¹⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

201569 is a deficient number, since it is larger than the sum of its proper divisors (16159).

201569 is a wasteful number, since it uses less digits than its factorization.

201569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 201569 is about 448.9643638419. The cubic root of 201569 is about 58.6328827240.

The spelling of 201569 in words is "two hundred one thousand, five hundred sixty-nine".