55017145 has 8 divisors (see below), whose sum is σ = 66503304. Its totient is φ = 43691904.

The previous prime is 55017143. The next prime is 55017199. The reversal of 55017145 is 54171055.

It can be written as a sum of positive squares in 4 ways, for example, as 670761 + 54346384 = 819^2 + 7372^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 55017145 - 2¹ = 55017143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55017143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39474 + ... + 40843.

It is an arithmetic number, because the mean of its divisors is an integer number (8312913).

Almost surely, 2^55017145 is an apocalyptic number.

It is an amenable number.

55017145 is a deficient number, since it is larger than the sum of its proper divisors (11486159).

55017145 is a wasteful number, since it uses less digits than its factorization.

55017145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80459.

The product of its (nonzero) digits is 3500, while the sum is 28.

The square root of 55017145 is about 7417.3543126913. The cubic root of 55017145 is about 380.3347581041.

The spelling of 55017145 in words is "fifty-five million, seventeen thousand, one hundred forty-five".