2171697416 has 64 divisors (see below), whose sum is σ = 5002905600. Its totient is φ = 862961472.

The previous prime is 2171697403. The next prime is 2171697449. The reversal of 2171697416 is 6147961712.

It is a super-2 number, since 2×2171697416² = 9432539333322154112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28295 + ... + 71721.

It is an arithmetic number, because the mean of its divisors is an integer number (78170400).

Almost surely, 2^2171697416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2171697416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2501452800).

2171697416 is an abundant number, since it is smaller than the sum of its proper divisors (2831208184).

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

2171697416 is a wasteful number, since it uses less digits than its factorization.

2171697416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43506 (or 43502 counting only the distinct ones).

The product of its digits is 127008, while the sum is 44.

The square root of 2171697416 is about 46601.4743972763. The cubic root of 2171697416 is about 1294.9900698393.

The spelling of 2171697416 in words is "two billion, one hundred seventy-one million, six hundred ninety-seven thousand, four hundred sixteen".