5531609 has 4 divisors (see below), whose sum is σ = 5710080. Its totient is φ = 5353140.

The previous prime is 5531599. The next prime is 5531621. The reversal of 5531609 is 9061355.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9061355 = 5 ⋅1812271.

It is a cyclic number.

It is not a de Polignac number, because 5531609 - 2⁴ = 5531593 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5531639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89189 + ... + 89250.

It is an arithmetic number, because the mean of its divisors is an integer number (1427520).

Almost surely, 2^5531609 is an apocalyptic number.

It is an amenable number.

5531609 is a deficient number, since it is larger than the sum of its proper divisors (178471).

5531609 is a wasteful number, since it uses less digits than its factorization.

5531609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178470.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 5531609 is about 2351.9372865789. The cubic root of 5531609 is about 176.8549249068.

The spelling of 5531609 in words is "five million, five hundred thirty-one thousand, six hundred nine".