105551 has 4 divisors (see below), whose sum is σ = 107400. Its totient is φ = 103704.

The previous prime is 105541. The next prime is 105557. The reversal of 105551 is 155501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 105551 - 2¹⁰ = 104527 is a prime.

It is a super-2 number, since 2×105551² = 22282027202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836 + ... + 953.

It is an arithmetic number, because the mean of its divisors is an integer number (26850).

2¹⁰⁵⁵⁵¹ is an apocalyptic number.

105551 is a deficient number, since it is larger than the sum of its proper divisors (1849).

105551 is an equidigital number, since it uses as much as digits as its factorization.

105551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848.

The product of its (nonzero) digits is 125, while the sum is 17.

The square root of 105551 is about 324.8861338992. The cubic root of 105551 is about 47.2593180768.

It can be divided in two parts, 105 and 551, that added together give a palindrome (656).

The spelling of 105551 in words is "one hundred five thousand, five hundred fifty-one".