53566 has 4 divisors (see below), whose sum is σ = 80352. Its totient is φ = 26782.

The previous prime is 53551. The next prime is 53569. The reversal of 53566 is 66535.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 53566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53569) by changing a digit.

53566 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13390 + ... + 13393.

It is an arithmetic number, because the mean of its divisors is an integer number (20088).

2⁵³⁵⁶⁶ is an apocalyptic number.

53566 is a deficient number, since it is larger than the sum of its proper divisors (26786).

53566 is a wasteful number, since it uses less digits than its factorization.

53566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26785.

The product of its digits is 2700, while the sum is 25.

The square root of 53566 is about 231.4432975914. The cubic root of 53566 is about 37.6960986800.

The spelling of 53566 in words is "fifty-three thousand, five hundred sixty-six".