52381 has 6 divisors (see below), whose sum is σ = 60990. Its totient is φ = 44856.

The previous prime is 52379. The next prime is 52387. The reversal of 52381 is 18325.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 44100 + 8281 = 210^2 + 91^2 .

It is not a de Polignac number, because 52381 - 2¹ = 52379 is a prime.

It is a super-2 number, since 2×52381² = 5487538322, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52387) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 486 + ... + 583.

It is an arithmetic number, because the mean of its divisors is an integer number (10165).

2⁵²³⁸¹ is an apocalyptic number.

It is an amenable number.

52381 is a deficient number, since it is larger than the sum of its proper divisors (8609).

52381 is a wasteful number, since it uses less digits than its factorization.

52381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083 (or 1076 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 52381 is about 228.8689581398. The cubic root of 52381 is about 37.4160492378.

The spelling of 52381 in words is "fifty-two thousand, three hundred eighty-one".