55886181 has 8 divisors (see below), whose sum is σ = 80246880. Its totient is φ = 34391472.

The previous prime is 55886143. The next prime is 55886189. The reversal of 55886181 is 18168855.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55886181 - 2²² = 51691877 is a prime.

It is a super-2 number, since 2×55886181² = 6246530453529522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 (55886189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716451 + ... + 716528.

It is an arithmetic number, because the mean of its divisors is an integer number (10030860).

Almost surely, 2^55886181 is an apocalyptic number.

It is an amenable number.

55886181 is a deficient number, since it is larger than the sum of its proper divisors (24360699).

55886181 is a wasteful number, since it uses less digits than its factorization.

55886181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432995.

The product of its digits is 76800, while the sum is 42.

The square root of 55886181 is about 7475.7060536113. The cubic root of 55886181 is about 382.3268608516.

The spelling of 55886181 in words is "fifty-five million, eight hundred eighty-six thousand, one hundred eighty-one".