55681101 has 30 divisors (see below), whose sum is σ = 96764910. Its totient is φ = 31815504.

The previous prime is 55681063. The next prime is 55681127. The reversal of 55681101 is 10118655.

55681101 is a `hidden beast` number, since 556 + 8 + 1 + 101 = 666.

It can be written as a sum of positive squares in only one way, i.e., 32148900 + 23532201 = 5670^2 + 4851^2 .

It is not a de Polignac number, because 55681101 - 2⁹ = 55680589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55681141) 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 29 ways as a sum of consecutive naturals, for example, 3046 + ... + 10983.

It is an arithmetic number, because the mean of its divisors is an integer number (3225497).

Almost surely, 2^55681101 is an apocalyptic number.

It is an amenable number.

55681101 is a deficient number, since it is larger than the sum of its proper divisors (41083809).

55681101 is a wasteful number, since it uses less digits than its factorization.

55681101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14055 (or 14039 counting only the distinct ones).

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

The square root of 55681101 is about 7461.9770168502. The cubic root of 55681101 is about 381.8586252614.

Adding to 55681101 its reverse (10118655), we get a palindrome (65799756).

The spelling of 55681101 in words is "fifty-five million, six hundred eighty-one thousand, one hundred one".