2123155330 has 32 divisors (see below), whose sum is σ = 4049585280. Its totient is φ = 798693120.

The previous prime is 2123155283. The next prime is 2123155339. The reversal of 2123155330 is 335513212.

It is a junction number, because it is equal to n+sod(n) for n = 2123155295 and 2123155304.

It is not an unprimeable number, because it can be changed into a prime (2123155339) 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, 261025 + ... + 269035.

It is an arithmetic number, because the mean of its divisors is an integer number (126549540).

Almost surely, 2^2123155330 is an apocalyptic number.

2123155330 is a deficient number, since it is larger than the sum of its proper divisors (1926429950).

2123155330 is a wasteful number, since it uses less digits than its factorization.

2123155330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9594.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 2123155330 is about 46077.7096870059. The cubic root of 2123155330 is about 1285.2686746109.

Adding to 2123155330 its reverse (335513212), we get a palindrome (2458668542).

The spelling of 2123155330 in words is "two billion, one hundred twenty-three million, one hundred fifty-five thousand, three hundred thirty".