55040181 has 32 divisors (see below), whose sum is σ = 86688000. Its totient is φ = 31046400.

The previous prime is 55040179. The next prime is 55040189. The reversal of 55040181 is 18104055.

It is not a de Polignac number, because 55040181 - 2¹ = 55040179 is a prime.

It is a super-2 number, since 2×55040181² = 6058843049025522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55040189) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91281 + ... + 91881.

It is an arithmetic number, because the mean of its divisors is an integer number (2709000).

Almost surely, 2^55040181 is an apocalyptic number.

It is an amenable number.

55040181 is a deficient number, since it is larger than the sum of its proper divisors (31647819).

55040181 is an equidigital number, since it uses as much as digits as its factorization.

55040181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 55040181 is about 7418.9069949690. The cubic root of 55040181 is about 380.3878334921.

The spelling of 55040181 in words is "fifty-five million, forty thousand, one hundred eighty-one".