2171973312 has 224 divisors, whose sum is σ = 6833859840. Its totient is φ = 674058240.

The previous prime is 2171973253. The next prime is 2171973359. The reversal of 2171973312 is 2133791712.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3142887 + ... + 3143577.

Almost surely, 2^2171973312 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 2171973312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3416929920).

2171973312 is an abundant number, since it is smaller than the sum of its proper divisors (4661886528).

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

2171973312 is a wasteful number, since it uses less digits than its factorization.

2171973312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836 (or 820 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 2171973312 is about 46604.4344671191. The cubic root of 2171973312 is about 1295.0449067377.

The spelling of 2171973312 in words is "two billion, one hundred seventy-one million, nine hundred seventy-three thousand, three hundred twelve".