2731112161 has 4 divisors (see below), whose sum is σ = 2849856192. Its totient is φ = 2612368132.

The previous prime is 2731112129. The next prime is 2731112173. The reversal of 2731112161 is 1612111372.

2731112161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2731112161 - 2⁵ = 2731112129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2731112861) 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, 59371981 + ... + 59372026.

It is an arithmetic number, because the mean of its divisors is an integer number (712464048).

Almost surely, 2^2731112161 is an apocalyptic number.

It is an amenable number.

2731112161 is a deficient number, since it is larger than the sum of its proper divisors (118744031).

2731112161 is a wasteful number, since it uses less digits than its factorization.

2731112161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118744030.

The product of its digits is 504, while the sum is 25.

The square root of 2731112161 is about 52260.0436375631. The cubic root of 2731112161 is about 1397.8047502157.

The spelling of 2731112161 in words is "two billion, seven hundred thirty-one million, one hundred twelve thousand, one hundred sixty-one".