55155145 has 8 divisors (see below), whose sum is σ = 66240000. Its totient is φ = 44088240.

The previous prime is 55155131. The next prime is 55155151. The reversal of 55155145 is 54155155.

55155145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55155145 - 2⁹ = 55154633 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3606 + ... + 11104.

It is an arithmetic number, because the mean of its divisors is an integer number (8280000).

Almost surely, 2^55155145 is an apocalyptic number.

It is an amenable number.

55155145 is a deficient number, since it is larger than the sum of its proper divisors (11084855).

55155145 is a wasteful number, since it uses less digits than its factorization.

55155145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8975.

The product of its digits is 12500, while the sum is 31.

The square root of 55155145 is about 7426.6509948967. The cubic root of 55155145 is about 380.6524916264.

It can be divided in two parts, 551 and 55145, that added together give a square (55696 = 236²).

The spelling of 55155145 in words is "fifty-five million, one hundred fifty-five thousand, one hundred forty-five".