55166171 has 4 divisors (see below), whose sum is σ = 55310592. Its totient is φ = 55021752.

The previous prime is 55166147. The next prime is 55166179. The reversal of 55166171 is 17166155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17166155 = 5 ⋅3433231.

It is a cyclic number.

It is not a de Polignac number, because 55166171 - 2²² = 50971867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55166179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71636 + ... + 72401.

It is an arithmetic number, because the mean of its divisors is an integer number (13827648).

Almost surely, 2^55166171 is an apocalyptic number.

55166171 is a deficient number, since it is larger than the sum of its proper divisors (144421).

55166171 is a wasteful number, since it uses less digits than its factorization.

55166171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144420.

The product of its digits is 6300, while the sum is 32.

The square root of 55166171 is about 7427.3932843226. The cubic root of 55166171 is about 380.6778551999.

The spelling of 55166171 in words is "fifty-five million, one hundred sixty-six thousand, one hundred seventy-one".