55601181 has 8 divisors (see below), whose sum is σ = 82372160. Its totient is φ = 37067436.

The previous prime is 55601173. The next prime is 55601191. The reversal of 55601181 is 18110655.

55601181 is a `hidden beast` number, since 55 + 601 + 1 + 8 + 1 = 666.

It is not a de Polignac number, because 55601181 - 2³ = 55601173 is a prime.

It is a super-2 number, since 2×55601181² = 6182982657189522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2059303 = 55601181 / (5 + 5 + 6 + 0 + 1 + 1 + 8 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55601131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1029625 + ... + 1029678.

It is an arithmetic number, because the mean of its divisors is an integer number (10296520).

Almost surely, 2^55601181 is an apocalyptic number.

It is an amenable number.

55601181 is a deficient number, since it is larger than the sum of its proper divisors (26770979).

55601181 is a wasteful number, since it uses less digits than its factorization.

55601181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059312 (or 2059306 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

The square root of 55601181 is about 7456.6199447203. The cubic root of 55601181 is about 381.6758417945.

The spelling of 55601181 in words is "fifty-five million, six hundred one thousand, one hundred eighty-one".