112155209 has 4 divisors (see below), whose sum is σ = 116022660. Its totient is φ = 108287760.

The previous prime is 112155203. The next prime is 112155287. The reversal of 112155209 is 902551211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 902551211 = 23 ⋅39241357.

It can be written as a sum of positive squares in 2 ways, for example, as 40921609 + 71233600 = 6397^2 + 8440^2 .

It is a cyclic number.

It is not a de Polignac number, because 112155209 - 2⁸ = 112154953 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (112155203) 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, 1933682 + ... + 1933739.

It is an arithmetic number, because the mean of its divisors is an integer number (29005665).

Almost surely, 2^112155209 is an apocalyptic number.

It is an amenable number.

112155209 is a deficient number, since it is larger than the sum of its proper divisors (3867451).

112155209 is an equidigital number, since it uses as much as digits as its factorization.

112155209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867450.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 112155209 is about 10590.3356415177. The cubic root of 112155209 is about 482.2510142078.

The spelling of 112155209 in words is "one hundred twelve million, one hundred fifty-five thousand, two hundred nine".