55245609 has 24 divisors (see below), whose sum is σ = 86149440. Its totient is φ = 34010592.

The previous prime is 55245607. The next prime is 55245613. The reversal of 55245609 is 90654255.

55245609 is a `hidden beast` number, since 5 + 5 + 2 + 45 + 609 = 666.

It is not a de Polignac number, because 55245609 - 2¹ = 55245607 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (55245601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1402 + ... + 10604.

It is an arithmetic number, because the mean of its divisors is an integer number (3589560).

Almost surely, 2^55245609 is an apocalyptic number.

It is an amenable number.

55245609 is a deficient number, since it is larger than the sum of its proper divisors (30903831).

55245609 is a wasteful number, since it uses less digits than its factorization.

55245609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9261 (or 9258 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 55245609 is about 7432.7389971665. The cubic root of 55245609 is about 380.8604899765.

The spelling of 55245609 in words is "fifty-five million, two hundred forty-five thousand, six hundred nine".