2171157216 has 48 divisors (see below), whose sum is σ = 5708102400. Its totient is φ = 722599808.

The previous prime is 2171157127. The next prime is 2171157217. The reversal of 2171157216 is 6127511712.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171157217) 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 7 ways as a sum of consecutive naturals, for example, 46105 + ... + 80423.

It is an arithmetic number, because the mean of its divisors is an integer number (118918800).

Almost surely, 2^2171157216 is an apocalyptic number.

It is an amenable number.

2171157216 is an abundant number, since it is smaller than the sum of its proper divisors (3536945184).

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

2171157216 is a wasteful number, since it uses less digits than its factorization.

2171157216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34991 (or 34983 counting only the distinct ones).

The product of its digits is 5880, while the sum is 33.

The square root of 2171157216 is about 46595.6780828437. The cubic root of 2171157216 is about 1294.8826866096.

Adding to 2171157216 its reverse (6127511712), we get a palindrome (8298668928).

The spelling of 2171157216 in words is "two billion, one hundred seventy-one million, one hundred fifty-seven thousand, two hundred sixteen".