55065161 has 4 divisors (see below), whose sum is σ = 55141632. Its totient is φ = 54988692.

The previous prime is 55065137. The next prime is 55065169. The reversal of 55065161 is 16156055.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16156055 = 5 ⋅3231211.

It is a cyclic number.

It is not a de Polignac number, because 55065161 - 2¹⁸ = 54803017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55065169) 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 3 ways as a sum of consecutive naturals, for example, 37145 + ... + 38598.

It is an arithmetic number, because the mean of its divisors is an integer number (13785408).

Almost surely, 2^55065161 is an apocalyptic number.

It is an amenable number.

55065161 is a deficient number, since it is larger than the sum of its proper divisors (76471).

55065161 is an equidigital number, since it uses as much as digits as its factorization.

55065161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76470.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 55065161 is about 7420.5903403975. The cubic root of 55065161 is about 380.4453711598.

The spelling of 55065161 in words is "fifty-five million, sixty-five thousand, one hundred sixty-one".