101800055 has 8 divisors (see below), whose sum is σ = 139611552. Its totient is φ = 69805728.

The previous prime is 101800051. The next prime is 101800079. The reversal of 101800055 is 550008101.

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

It is a cyclic number.

It is not a de Polignac number, because 101800055 - 2² = 101800051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101800051) 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 7 ways as a sum of consecutive naturals, for example, 1454252 + ... + 1454321.

It is an arithmetic number, because the mean of its divisors is an integer number (17451444).

Almost surely, 2^101800055 is an apocalyptic number.

101800055 is a deficient number, since it is larger than the sum of its proper divisors (37811497).

101800055 is an equidigital number, since it uses as much as digits as its factorization.

101800055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908585.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 101800055 is about 10089.6013300824. The cubic root of 101800055 is about 466.9273761495.

Adding to 101800055 its reverse (550008101), we get a palindrome (651808156).

The spelling of 101800055 in words is "one hundred one million, eight hundred thousand, fifty-five".