2123443331 has 4 divisors (see below), whose sum is σ = 2126656464. Its totient is φ = 2120230200.

The previous prime is 2123443319. The next prime is 2123443349. The reversal of 2123443331 is 1333443212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2123443331 is a prime.

It is a super-2 number, since 2×2123443331² = 9018023159936751122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2123443331.

It is not an unprimeable number, because it can be changed into a prime (2123443631) 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, 1605575 + ... + 1606896.

It is an arithmetic number, because the mean of its divisors is an integer number (531664116).

Almost surely, 2^2123443331 is an apocalyptic number.

2123443331 is a deficient number, since it is larger than the sum of its proper divisors (3213133).

2123443331 is an equidigital number, since it uses as much as digits as its factorization.

2123443331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213132.

The product of its digits is 5184, while the sum is 26.

The square root of 2123443331 is about 46080.8347472135. The cubic root of 2123443331 is about 1285.3267865356.

Adding to 2123443331 its reverse (1333443212), we get a palindrome (3456886543).

The spelling of 2123443331 in words is "two billion, one hundred twenty-three million, four hundred forty-three thousand, three hundred thirty-one".