2152155212 has 12 divisors (see below), whose sum is σ = 3766630560. Its totient is φ = 1075975056.

The previous prime is 2152155211. The next prime is 2152155217. The reversal of 2152155212 is 2125512512.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2152155211) 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, 40589 + ... + 77147.

It is an arithmetic number, because the mean of its divisors is an integer number (313885880).

Almost surely, 2^2152155212 is an apocalyptic number.

It is an amenable number.

2152155212 is a deficient number, since it is larger than the sum of its proper divisors (1614475348).

2152155212 is a wasteful number, since it uses less digits than its factorization.

2152155212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51280 (or 51278 counting only the distinct ones).

The product of its digits is 2000, while the sum is 26.

The square root of 2152155212 is about 46391.3269049291. The cubic root of 2152155212 is about 1291.0940005470.

Adding to 2152155212 its reverse (2125512512), we get a palindrome (4277667724).

The spelling of 2152155212 in words is "two billion, one hundred fifty-two million, one hundred fifty-five thousand, two hundred twelve".