55587149 has 4 divisors (see below), whose sum is σ = 55908636. Its totient is φ = 55265664.

The previous prime is 55587137. The next prime is 55587151. The reversal of 55587149 is 94178555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23833924 + 31753225 = 4882^2 + 5635^2 .

It is a cyclic number.

It is not a de Polignac number, because 55587149 - 2⁸ = 55586893 is a prime.

It is a super-2 number, since 2×55587149² = 6179862267896402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55587109) 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, 160484 + ... + 160829.

It is an arithmetic number, because the mean of its divisors is an integer number (13977159).

Almost surely, 2^55587149 is an apocalyptic number.

It is an amenable number.

55587149 is a deficient number, since it is larger than the sum of its proper divisors (321487).

55587149 is a wasteful number, since it uses less digits than its factorization.

55587149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321486.

The product of its digits is 252000, while the sum is 44.

The square root of 55587149 is about 7455.6789764581. The cubic root of 55587149 is about 381.6437314093.

The spelling of 55587149 in words is "fifty-five million, five hundred eighty-seven thousand, one hundred forty-nine".