2171633216 has 28 divisors (see below), whose sum is σ = 4457936220. Its totient is φ = 1048373760.

The previous prime is 2171633207. The next prime is 2171633221. The reversal of 2171633216 is 6123361712.

It can be written as a sum of positive squares in 2 ways, for example, as 542703616 + 1628929600 = 23296^2 + 40360^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 583175 + ... + 586886.

Almost surely, 2^2171633216 is an apocalyptic number.

It is an amenable number.

2171633216 is an abundant number, since it is smaller than the sum of its proper divisors (2286303004).

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

2171633216 is a wasteful number, since it uses less digits than its factorization.

2171633216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170102 (or 1170092 counting only the distinct ones).

The product of its digits is 9072, while the sum is 32.

The square root of 2171633216 is about 46600.7855727776. The cubic root of 2171633216 is about 1294.9773088256.

Adding to 2171633216 its reverse (6123361712), we get a palindrome (8294994928).

The spelling of 2171633216 in words is "two billion, one hundred seventy-one million, six hundred thirty-three thousand, two hundred sixteen".