55009549 has 16 divisors (see below), whose sum is σ = 65704320. Its totient is φ = 45057600.

The previous prime is 55009543. The next prime is 55009553. The reversal of 55009549 is 94590055.

It is not a de Polignac number, because 55009549 - 2⁹ = 55009037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55009543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19162 + ... + 21844.

It is an arithmetic number, because the mean of its divisors is an integer number (4106520).

Almost surely, 2^55009549 is an apocalyptic number.

It is an amenable number.

55009549 is a deficient number, since it is larger than the sum of its proper divisors (10694771).

55009549 is a wasteful number, since it uses less digits than its factorization.

55009549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2820.

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 55009549 is about 7416.8422526032. The cubic root of 55009549 is about 380.3172535256.

The spelling of 55009549 in words is "fifty-five million, nine thousand, five hundred forty-nine".