53771 has 4 divisors (see below), whose sum is σ = 56952. Its totient is φ = 50592.

The previous prime is 53759. The next prime is 53773. The reversal of 53771 is 17735.

53771 = T₁₈ + T₁₉ + ... + T₆₈.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17735 = 5 ⋅3547.

It is not a de Polignac number, because 53771 - 2¹⁰ = 52747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1565 + ... + 1598.

It is an arithmetic number, because the mean of its divisors is an integer number (14238).

2⁵³⁷⁷¹ is an apocalyptic number.

53771 is a deficient number, since it is larger than the sum of its proper divisors (3181).

53771 is a wasteful number, since it uses less digits than its factorization.

53771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3180.

The product of its digits is 735, while the sum is 23.

The square root of 53771 is about 231.8857477294. The cubic root of 53771 is about 37.7441258056.

The spelling of 53771 in words is "fifty-three thousand, seven hundred seventy-one".