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100055 = 520011
BaseRepresentation
bin11000011011010111
312002020202
4120123113
511200210
62051115
7564464
oct303327
9162222
10100055
116919a
1249a9b
1336707
142866b
151e9a5
hex186d7

100055 has 4 divisors (see below), whose sum is σ = 120072. Its totient is φ = 80040.

The previous prime is 100049. The next prime is 100057. The reversal of 100055 is 550001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550001 = 1732353.

It is not a de Polignac number, because 100055 - 26 = 99991 is a prime.

It is a super-2 number, since 2×1000552 = 20022006050, which contains 22 as substring.

It is a Duffinian number.

100055 is a modest number, since divided by 55 gives 10 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100057) 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, 10001 + ... + 10010.

It is an arithmetic number, because the mean of its divisors is an integer number (30018).

2100055 is an apocalyptic number.

100055 is a deficient number, since it is larger than the sum of its proper divisors (20017).

100055 is an equidigital number, since it uses as much as digits as its factorization.

100055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20016.

The product of its (nonzero) digits is 25, while the sum is 11.

The square root of 100055 is about 316.3147166984. The cubic root of 100055 is about 46.4243963560.

Adding to 100055 its reverse (550001), we get a palindrome (650056).

The spelling of 100055 in words is "one hundred thousand, fifty-five".

Divisors: 1 5 20011 100055