2171530430472 has 288 divisors, whose sum is σ = 6283102089600. Its totient is φ = 624950816256.

The previous prime is 2171530430467. The next prime is 2171530430497. The reversal of 2171530430472 is 2740340351712.

It is a super-2 number, since 2×2171530430472² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 2171530430472.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 115663678 + ... + 115682450.

It is an arithmetic number, because the mean of its divisors is an integer number (21816326700).

Almost surely, 2^{2171530430472} 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 2171530430472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3141551044800).

2171530430472 is an abundant number, since it is smaller than the sum of its proper divisors (4111571659128).

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

2171530430472 is a wasteful number, since it uses less digits than its factorization.

2171530430472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18925 (or 18889 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 39.

The spelling of 2171530430472 in words is "two trillion, one hundred seventy-one billion, five hundred thirty million, four hundred thirty thousand, four hundred seventy-two".