101855 has 8 divisors (see below), whose sum is σ = 131712. Its totient is φ = 75168.

The previous prime is 101839. The next prime is 101863. The reversal of 101855 is 558101.

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 101855 - 2⁴ = 101839 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 719 + ... + 848.

It is an arithmetic number, because the mean of its divisors is an integer number (16464).

2¹⁰¹⁸⁵⁵ is an apocalyptic number.

101855 is a deficient number, since it is larger than the sum of its proper divisors (29857).

101855 is a wasteful number, since it uses less digits than its factorization.

101855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585.

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

The square root of 101855 is about 319.1473014143. The cubic root of 101855 is about 46.7011366642.

Adding to 101855 its reverse (558101), we get a palindrome (659956).

The spelling of 101855 in words is "one hundred one thousand, eight hundred fifty-five".