55101 has 4 divisors (see below), whose sum is σ = 73472. Its totient is φ = 36732.

The previous prime is 55079. The next prime is 55103. The reversal of 55101 is 10155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55101 - 2⁷ = 54973 is a prime.

It is a super-2 number, since 2×55101² = 6072240402, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55103) 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 3 ways as a sum of consecutive naturals, for example, 9181 + ... + 9186.

It is an arithmetic number, because the mean of its divisors is an integer number (18368).

2⁵⁵¹⁰¹ is an apocalyptic number.

It is an amenable number.

55101 is a deficient number, since it is larger than the sum of its proper divisors (18371).

55101 is a wasteful number, since it uses less digits than its factorization.

55101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18370.

The product of its (nonzero) digits is 25, while the sum is 12.

The square root of 55101 is about 234.7360219481. The cubic root of 55101 is about 38.0527890515.

Adding to 55101 its reverse (10155), we get a palindrome (65256).

It can be divided in two parts, 55 and 101, that multiplied together give a palindrome (5555).

The spelling of 55101 in words is "fifty-five thousand, one hundred one".