55117161 has 48 divisors (see below), whose sum is σ = 91623168. Its totient is φ = 31622400.

The previous prime is 55117159. The next prime is 55117201. The reversal of 55117161 is 16171155.

It is a happy number.

It is not a de Polignac number, because 55117161 - 2¹ = 55117159 is a prime.

It is a super-3 number, since 3×55117161³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (55117861) 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 47 ways as a sum of consecutive naturals, for example, 150000 + ... + 150366.

It is an arithmetic number, because the mean of its divisors is an integer number (1908816).

Almost surely, 2^55117161 is an apocalyptic number.

It is an amenable number.

55117161 is a deficient number, since it is larger than the sum of its proper divisors (36506007).

55117161 is a wasteful number, since it uses less digits than its factorization.

55117161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 459 counting only the distinct ones).

The product of its digits is 1050, while the sum is 27.

The square root of 55117161 is about 7424.0932779700. The cubic root of 55117161 is about 380.5650895376.

It can be divided in two parts, 55117 and 161, that added together give a triangular number (55278 = T₃₃₂).

The spelling of 55117161 in words is "fifty-five million, one hundred seventeen thousand, one hundred sixty-one".