2123440234 has 16 divisors (see below), whose sum is σ = 3205520136. Its totient is φ = 1054944000.

The previous prime is 2123440223. The next prime is 2123440243. The reversal of 2123440234 is 4320443212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1152806209 + 970634025 = 33953^2 + 31155^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2123440199 and 2123440208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650334 + ... + 653590.

Almost surely, 2^2123440234 is an apocalyptic number.

2123440234 is a deficient number, since it is larger than the sum of its proper divisors (1082079902).

2123440234 is a wasteful number, since it uses less digits than its factorization.

2123440234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5241.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 2123440234 is about 46080.8011432093. The cubic root of 2123440234 is about 1285.3261616608.

Adding to 2123440234 its reverse (4320443212), we get a palindrome (6443883446).

The spelling of 2123440234 in words is "two billion, one hundred twenty-three million, four hundred forty thousand, two hundred thirty-four".