5515609 has 4 divisors (see below), whose sum is σ = 6017040. Its totient is φ = 5014180.

The previous prime is 5515603. The next prime is 5515619. The reversal of 5515609 is 9065155.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 5515609 - 2¹³ = 5507417 is a prime.

It is a Duffinian number.

5515609 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5515603) 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, 250699 + ... + 250720.

It is an arithmetic number, because the mean of its divisors is an integer number (1504260).

Almost surely, 2^5515609 is an apocalyptic number.

It is an amenable number.

5515609 is a deficient number, since it is larger than the sum of its proper divisors (501431).

5515609 is a wasteful number, since it uses less digits than its factorization.

5515609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501430.

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 5515609 is about 2348.5333721282. The cubic root of 5515609 is about 176.6842445229.

The spelling of 5515609 in words is "five million, five hundred fifteen thousand, six hundred nine".