2153231212 has 24 divisors (see below), whose sum is σ = 4188279312. Its totient is φ = 960273600.

The previous prime is 2153231209. The next prime is 2153231219. The reversal of 2153231212 is 2121323512.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (2153231219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459339 + ... + 464002.

It is an arithmetic number, because the mean of its divisors is an integer number (174511638).

Almost surely, 2^2153231212 is an apocalyptic number.

2153231212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2153231212 is a deficient number, since it is larger than the sum of its proper divisors (2035048100).

2153231212 is a wasteful number, since it uses less digits than its factorization.

2153231212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923409 (or 923407 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 2153231212 is about 46402.9224510698. The cubic root of 2153231212 is about 1291.3091315130.

Adding to 2153231212 its reverse (2121323512), we get a palindrome (4274554724).

The spelling of 2153231212 in words is "two billion, one hundred fifty-three million, two hundred thirty-one thousand, two hundred twelve".