161100105 has 16 divisors (see below), whose sum is σ = 257921280. Its totient is φ = 85866368.

The previous prime is 161100103. The next prime is 161100113. The reversal of 161100105 is 501001161.

It is a cyclic number.

It is not a de Polignac number, because 161100105 - 2¹ = 161100103 is a prime.

It is a super-2 number, since 2×161100105² = 51906487662022050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161100103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37456 + ... + 41534.

It is an arithmetic number, because the mean of its divisors is an integer number (16120080).

Almost surely, 2^161100105 is an apocalyptic number.

161100105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161100105 is a deficient number, since it is larger than the sum of its proper divisors (96821175).

161100105 is a wasteful number, since it uses less digits than its factorization.

161100105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6720.

The product of its (nonzero) digits is 30, while the sum is 15.

The square root of 161100105 is about 12692.5216170783. The cubic root of 161100105 is about 544.1249093667.

Adding to 161100105 its reverse (501001161), we get a palindrome (662101266).

The spelling of 161100105 in words is "one hundred sixty-one million, one hundred thousand, one hundred five".