55055145 has 16 divisors (see below), whose sum is σ = 89151552. Its totient is φ = 29008320.

The previous prime is 55055111. The next prime is 55055167. The reversal of 55055145 is 54155055.

It is not a de Polignac number, because 55055145 - 2⁸ = 55054889 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20866 + ... + 23355.

It is an arithmetic number, because the mean of its divisors is an integer number (5571972).

Almost surely, 2^55055145 is an apocalyptic number.

It is an amenable number.

55055145 is a deficient number, since it is larger than the sum of its proper divisors (34096407).

55055145 is a wasteful number, since it uses less digits than its factorization.

55055145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44312.

The product of its (nonzero) digits is 12500, while the sum is 30.

The square root of 55055145 is about 7419.9154307849. The cubic root of 55055145 is about 380.4223029025.

The spelling of 55055145 in words is "fifty-five million, fifty-five thousand, one hundred forty-five".