2142440321 has 4 divisors (see below), whose sum is σ = 2448503232. Its totient is φ = 1836377412.

The previous prime is 2142440269. The next prime is 2142440329. The reversal of 2142440321 is 1230442412.

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 2142440321 - 2⁶ = 2142440257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2142440329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153031445 + ... + 153031458.

It is an arithmetic number, because the mean of its divisors is an integer number (612125808).

Almost surely, 2^2142440321 is an apocalyptic number.

It is an amenable number.

2142440321 is a deficient number, since it is larger than the sum of its proper divisors (306062911).

2142440321 is an equidigital number, since it uses as much as digits as its factorization.

2142440321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306062910.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 2142440321 is about 46286.5025790457. The cubic root of 2142440321 is about 1289.1483915130.

Adding to 2142440321 its reverse (1230442412), we get a palindrome (3372882733).

The spelling of 2142440321 in words is "two billion, one hundred forty-two million, four hundred forty thousand, three hundred twenty-one".