2171501216 has 24 divisors (see below), whose sum is σ = 4333711284. Its totient is φ = 1070876160.

The previous prime is 2171501207. The next prime is 2171501221. The reversal of 2171501216 is 6121051712.

It can be written as a sum of positive squares in 2 ways, for example, as 2079724816 + 91776400 = 45604^2 + 9580^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462455 + ... + 467126.

Almost surely, 2^2171501216 is an apocalyptic number.

It is an amenable number.

2171501216 is a deficient number, since it is larger than the sum of its proper divisors (2162210068).

2171501216 is an equidigital number, since it uses as much as digits as its factorization.

2171501216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929664 (or 929656 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 2171501216 is about 46599.3692661178. The cubic root of 2171501216 is about 1294.9510704370.

Adding to 2171501216 its reverse (6121051712), we get a palindrome (8292552928).

The spelling of 2171501216 in words is "two billion, one hundred seventy-one million, five hundred one thousand, two hundred sixteen".