2031223161 has 16 divisors (see below), whose sum is σ = 2964960000. Its totient is φ = 1226688720.

The previous prime is 2031223157. The next prime is 2031223163. The reversal of 2031223161 is 1613221302.

It is not a de Polignac number, because 2031223161 - 2² = 2031223157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2031223163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99411 + ... + 118088.

It is an arithmetic number, because the mean of its divisors is an integer number (185310000).

Almost surely, 2^2031223161 is an apocalyptic number.

It is an amenable number.

2031223161 is a deficient number, since it is larger than the sum of its proper divisors (933736839).

2031223161 is a wasteful number, since it uses less digits than its factorization.

2031223161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217796.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 2031223161 is about 45069.0931903450. The cubic root of 2031223161 is about 1266.4436768665.

Adding to 2031223161 its reverse (1613221302), we get a palindrome (3644444463).

The spelling of 2031223161 in words is "two billion, thirty-one million, two hundred twenty-three thousand, one hundred sixty-one".