55169181 has 40 divisors (see below), whose sum is σ = 86237184. Its totient is φ = 35108640.

The previous prime is 55169173. The next prime is 55169197. The reversal of 55169181 is 18196155.

55169181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55169181 - 2³ = 55169173 is a prime.

It is a super-2 number, since 2×55169181² = 6087277064421522, which contains 22 as substring.

It is a house number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55169161) 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 39 ways as a sum of consecutive naturals, for example, 318811 + ... + 318983.

Almost surely, 2^55169181 is an apocalyptic number.

It is an amenable number.

55169181 is a deficient number, since it is larger than the sum of its proper divisors (31068003).

55169181 is a wasteful number, since it uses less digits than its factorization.

55169181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 334 counting only the distinct ones).

The product of its digits is 10800, while the sum is 36.

The square root of 55169181 is about 7427.5959098486. The cubic root of 55169181 is about 380.6847786428.

The spelling of 55169181 in words is "fifty-five million, one hundred sixty-nine thousand, one hundred eighty-one".