549381 has 8 divisors (see below), whose sum is σ = 837184. Its totient is φ = 313920.

The previous prime is 549379. The next prime is 549391. The reversal of 549381 is 183945.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 549381 - 2¹ = 549379 is a prime.

It is a super-2 number, since 2×549381² = 603638966322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 549381.

It is not an unprimeable number, because it can be changed into a prime (549331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13060 + ... + 13101.

It is an arithmetic number, because the mean of its divisors is an integer number (104648).

2⁵⁴⁹³⁸¹ is an apocalyptic number.

It is an amenable number.

549381 is a deficient number, since it is larger than the sum of its proper divisors (287803).

549381 is a wasteful number, since it uses less digits than its factorization.

549381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26171.

The product of its digits is 4320, while the sum is 30.

The square root of 549381 is about 741.2024015072. The cubic root of 549381 is about 81.9013785602.

The spelling of 549381 in words is "five hundred forty-nine thousand, three hundred eighty-one".