55555149 has 16 divisors (see below), whose sum is σ = 80523072. Its totient is φ = 33865728.

The previous prime is 55555147. The next prime is 55555163. The reversal of 55555149 is 94155555.

It is not a de Polignac number, because 55555149 - 2¹ = 55555147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555141) 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, 2484 + ... + 10829.

It is an arithmetic number, because the mean of its divisors is an integer number (5032692).

Almost surely, 2^55555149 is an apocalyptic number.

It is an amenable number.

55555149 is a deficient number, since it is larger than the sum of its proper divisors (24967923).

55555149 is a wasteful number, since it uses less digits than its factorization.

55555149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13436.

The product of its digits is 112500, while the sum is 39.

The square root of 55555149 is about 7453.5326523736. The cubic root of 55555149 is about 381.5704834023.

The spelling of 55555149 in words is "fifty-five million, five hundred fifty-five thousand, one hundred forty-nine".