109105281 has 6 divisors (see below), whose sum is σ = 157596530. Its totient is φ = 72736848.

The previous prime is 109105253. The next prime is 109105291. The reversal of 109105281 is 182501901.

It can be written as a sum of positive squares in only one way, i.e., 105267600 + 3837681 = 10260^2 + 1959^2 .

It is not a de Polignac number, because 109105281 - 2⁹ = 109104769 is a prime.

It is a super-2 number, since 2×109105281² = 23807924684177922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (109105211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6061396 + ... + 6061413.

Almost surely, 2^109105281 is an apocalyptic number.

It is an amenable number.

109105281 is a deficient number, since it is larger than the sum of its proper divisors (48491249).

109105281 is a wasteful number, since it uses less digits than its factorization.

109105281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12122815 (or 12122812 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 109105281 is about 10445.3473374513. The cubic root of 109105281 is about 477.8393643924.

The spelling of 109105281 in words is "one hundred nine million, one hundred five thousand, two hundred eighty-one".