55165871 has 4 divisors (see below), whose sum is σ = 55407000. Its totient is φ = 54924744.

The previous prime is 55165823. The next prime is 55165907. The reversal of 55165871 is 17856155.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55165871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55165811) 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, 120221 + ... + 120678.

It is an arithmetic number, because the mean of its divisors is an integer number (13851750).

Almost surely, 2^55165871 is an apocalyptic number.

55165871 is a deficient number, since it is larger than the sum of its proper divisors (241129).

55165871 is a wasteful number, since it uses less digits than its factorization.

55165871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241128.

The product of its digits is 42000, while the sum is 38.

The square root of 55165871 is about 7427.3730887845. The cubic root of 55165871 is about 380.6771651419.

The spelling of 55165871 in words is "fifty-five million, one hundred sixty-five thousand, eight hundred seventy-one".