55685145 has 24 divisors (see below), whose sum is σ = 92086848. Its totient is φ = 28733280.

The previous prime is 55685141. The next prime is 55685153. The reversal of 55685145 is 54158655.

It is not a de Polignac number, because 55685145 - 2² = 55685141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55685141) 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 23 ways as a sum of consecutive naturals, for example, 12484 + ... + 16346.

It is an arithmetic number, because the mean of its divisors is an integer number (3836952).

Almost surely, 2^55685145 is an apocalyptic number.

It is an amenable number.

55685145 is a deficient number, since it is larger than the sum of its proper divisors (36401703).

55685145 is a wasteful number, since it uses less digits than its factorization.

55685145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3933 (or 3902 counting only the distinct ones).

The product of its digits is 120000, while the sum is 39.

The square root of 55685145 is about 7462.2479856944. The cubic root of 55685145 is about 381.8678695643.

The spelling of 55685145 in words is "fifty-five million, six hundred eighty-five thousand, one hundred forty-five".