54381 has 4 divisors (see below), whose sum is σ = 72512. Its totient is φ = 36252.

The previous prime is 54377. The next prime is 54401. The reversal of 54381 is 18345.

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 not a de Polignac number, because 54381 - 2² = 54377 is a prime.

It is a super-2 number, since 2×54381² = 5914586322, which contains 22 as substring.

It is a D-number.

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 (54311) 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, 9061 + ... + 9066.

It is an arithmetic number, because the mean of its divisors is an integer number (18128).

2⁵⁴³⁸¹ is an apocalyptic number.

It is an amenable number.

54381 is a deficient number, since it is larger than the sum of its proper divisors (18131).

54381 is a wasteful number, since it uses less digits than its factorization.

54381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18130.

The product of its digits is 480, while the sum is 21.

The square root of 54381 is about 233.1973413228. The cubic root of 54381 is about 37.8863176756.

It can be divided in two parts, 54 and 381, that added together give a triangular number (435 = T₂₉).

The spelling of 54381 in words is "fifty-four thousand, three hundred eighty-one".