549131 has 4 divisors (see below), whose sum is σ = 599064. Its totient is φ = 499200.

The previous prime is 549121. The next prime is 549139. The reversal of 549131 is 131945.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 549131 - 2¹⁸ = 286987 is a prime.

It is a super-2 number, since 2×549131² = 603089710322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 549097 and 549106.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 549131.

It is not an unprimeable number, because it can be changed into a prime (549139) 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, 24950 + ... + 24971.

It is an arithmetic number, because the mean of its divisors is an integer number (149766).

2⁵⁴⁹¹³¹ is an apocalyptic number.

549131 is a deficient number, since it is larger than the sum of its proper divisors (49933).

549131 is a wasteful number, since it uses less digits than its factorization.

549131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49932.

The product of its digits is 540, while the sum is 23.

The square root of 549131 is about 741.0337374236. The cubic root of 549131 is about 81.8889533937. Note that the first 3 decimals are identical.

The spelling of 549131 in words is "five hundred forty-nine thousand, one hundred thirty-one".