2031143221 has 16 divisors (see below), whose sum is σ = 2222131968. Its totient is φ = 1849120000.

The previous prime is 2031143203. The next prime is 2031143273. The reversal of 2031143221 is 1223411302.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2031143221 - 2⁵ = 2031143189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031141221) 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, 48096 + ... + 79846.

It is an arithmetic number, because the mean of its divisors is an integer number (138883248).

Almost surely, 2^2031143221 is an apocalyptic number.

It is an amenable number.

2031143221 is a deficient number, since it is larger than the sum of its proper divisors (190988747).

2031143221 is a wasteful number, since it uses less digits than its factorization.

2031143221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31892.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2031143221 is about 45068.2063210863. The cubic root of 2031143221 is about 1266.4270627663.

Adding to 2031143221 its reverse (1223411302), we get a palindrome (3254554523).

The spelling of 2031143221 in words is "two billion, thirty-one million, one hundred forty-three thousand, two hundred twenty-one".