55018617 has 4 divisors (see below), whose sum is σ = 73358160. Its totient is φ = 36679076.

The previous prime is 55018573. The next prime is 55018631. The reversal of 55018617 is 71681055.

55018617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55018617 - 2¹⁹ = 54494329 is a prime.

It is a super-3 number, since 3×55018617³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (55018657) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9169767 + ... + 9169772.

It is an arithmetic number, because the mean of its divisors is an integer number (18339540).

Almost surely, 2^55018617 is an apocalyptic number.

It is an amenable number.

55018617 is a deficient number, since it is larger than the sum of its proper divisors (18339543).

55018617 is a wasteful number, since it uses less digits than its factorization.

55018617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18339542.

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 55018617 is about 7417.4535387827. The cubic root of 55018617 is about 380.3381500635.

The spelling of 55018617 in words is "fifty-five million, eighteen thousand, six hundred seventeen".