549631 has 6 divisors (see below), whose sum is σ = 575120. Its totient is φ = 525228.

The previous prime is 549623. The next prime is 549641. The reversal of 549631 is 136945.

549631 = 53² + 54² + ... + 121².

It is not a de Polignac number, because 549631 - 2³ = 549623 is a prime.

It is a super-2 number, since 2×549631² = 604188472322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 549631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549641) 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, 10 + ... + 1048.

2⁵⁴⁹⁶³¹ is an apocalyptic number.

549631 is a deficient number, since it is larger than the sum of its proper divisors (25489).

549631 is a wasteful number, since it uses less digits than its factorization.

549631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085 (or 1062 counting only the distinct ones).

The product of its digits is 3240, while the sum is 28.

The square root of 549631 is about 741.3710272192. The cubic root of 549631 is about 81.9137999579.

Subtracting from 549631 its reverse (136945), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 549631 in words is "five hundred forty-nine thousand, six hundred thirty-one".