2171323154 has 96 divisors (see below), whose sum is σ = 4629519360. Its totient is φ = 739627200.

The previous prime is 2171323129. The next prime is 2171323159. The reversal of 2171323154 is 4513231712.

It is not an unprimeable number, because it can be changed into a prime (2171323159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 492299 + ... + 496689.

It is an arithmetic number, because the mean of its divisors is an integer number (48224160).

Almost surely, 2^2171323154 is an apocalyptic number.

2171323154 is an abundant number, since it is smaller than the sum of its proper divisors (2458196206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2171323154 is a wasteful number, since it uses less digits than its factorization.

2171323154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4456 (or 4443 counting only the distinct ones).

The product of its digits is 5040, while the sum is 29.

The square root of 2171323154 is about 46597.4586646096. The cubic root of 2171323154 is about 1294.9156743589.

Adding to 2171323154 its reverse (4513231712), we get a palindrome (6684554866).

The spelling of 2171323154 in words is "two billion, one hundred seventy-one million, three hundred twenty-three thousand, one hundred fifty-four".