55309549 has 8 divisors (see below), whose sum is σ = 59576832. Its totient is φ = 51197520.

The previous prime is 55309547. The next prime is 55309571. The reversal of 55309549 is 94590355.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55309549 - 2¹ = 55309547 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 (55309547) 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 7 ways as a sum of consecutive naturals, for example, 38074 + ... + 39499.

It is an arithmetic number, because the mean of its divisors is an integer number (7447104).

Almost surely, 2^55309549 is an apocalyptic number.

It is an amenable number.

55309549 is a deficient number, since it is larger than the sum of its proper divisors (4267283).

55309549 is a wasteful number, since it uses less digits than its factorization.

55309549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77627.

The product of its (nonzero) digits is 121500, while the sum is 40.

The square root of 55309549 is about 7437.0389941159. The cubic root of 55309549 is about 381.0073663908.

The spelling of 55309549 in words is "fifty-five million, three hundred nine thousand, five hundred forty-nine".