53817 has 4 divisors (see below), whose sum is σ = 71760. Its totient is φ = 35876.

The previous prime is 53813. The next prime is 53819. The reversal of 53817 is 71835.

53817 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53817 - 2² = 53813 is a prime.

It is a D-number.

53817 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (53813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8967 + ... + 8972.

It is an arithmetic number, because the mean of its divisors is an integer number (17940).

2⁵³⁸¹⁷ is an apocalyptic number.

It is an amenable number.

53817 is a deficient number, since it is larger than the sum of its proper divisors (17943).

53817 is a wasteful number, since it uses less digits than its factorization.

53817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17942.

The product of its digits is 840, while the sum is 24.

The square root of 53817 is about 231.9849133026. The cubic root of 53817 is about 37.7548858492.

It can be divided in two parts, 538 and 17, that added together give a palindrome (555).

The spelling of 53817 in words is "fifty-three thousand, eight hundred seventeen".