55591149 has 4 divisors (see below), whose sum is σ = 74121536. Its totient is φ = 37060764.

The previous prime is 55591097. The next prime is 55591171. The reversal of 55591149 is 94119555.

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 not a de Polignac number, because 55591149 - 2⁸ = 55590893 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 (55591189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9265189 + ... + 9265194.

It is an arithmetic number, because the mean of its divisors is an integer number (18530384).

Almost surely, 2^55591149 is an apocalyptic number.

It is an amenable number.

55591149 is a deficient number, since it is larger than the sum of its proper divisors (18530387).

55591149 is a wasteful number, since it uses less digits than its factorization.

55591149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18530386.

The product of its digits is 40500, while the sum is 39.

The square root of 55591149 is about 7455.9472235257. The cubic root of 55591149 is about 381.6528854335.

The spelling of 55591149 in words is "fifty-five million, five hundred ninety-one thousand, one hundred forty-nine".