55471609 has 4 divisors (see below), whose sum is σ = 56651904. Its totient is φ = 54291316.

The previous prime is 55471579. The next prime is 55471627. The reversal of 55471609 is 90617455.

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 55471609 - 2¹⁵ = 55438841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55471649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 590077 + ... + 590170.

It is an arithmetic number, because the mean of its divisors is an integer number (14162976).

Almost surely, 2^55471609 is an apocalyptic number.

It is an amenable number.

55471609 is a deficient number, since it is larger than the sum of its proper divisors (1180295).

55471609 is a wasteful number, since it uses less digits than its factorization.

55471609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180294.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 55471609 is about 7447.9264899702. The cubic root of 55471609 is about 381.3791276656.

The spelling of 55471609 in words is "fifty-five million, four hundred seventy-one thousand, six hundred nine".