2431142221 has 4 divisors (see below), whose sum is σ = 2433646944. Its totient is φ = 2428637500.

The previous prime is 2431142173. The next prime is 2431142243. The reversal of 2431142221 is 1222411342.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1222411342 = 2 ⋅611205671.

It is a cyclic number.

It is not a de Polignac number, because 2431142221 - 2²⁷ = 2296924493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2431142192 and 2431142201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2431142261) 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 3 ways as a sum of consecutive naturals, for example, 1250905 + ... + 1252846.

It is an arithmetic number, because the mean of its divisors is an integer number (608411736).

Almost surely, 2^2431142221 is an apocalyptic number.

It is an amenable number.

2431142221 is a deficient number, since it is larger than the sum of its proper divisors (2504723).

2431142221 is an equidigital number, since it uses as much as digits as its factorization.

2431142221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504722.

The product of its digits is 768, while the sum is 22.

The square root of 2431142221 is about 49306.6143737329. The cubic root of 2431142221 is about 1344.6320393086.

Adding to 2431142221 its reverse (1222411342), we get a palindrome (3653553563).

The spelling of 2431142221 in words is "two billion, four hundred thirty-one million, one hundred forty-two thousand, two hundred twenty-one".