2171992914 has 192 divisors, whose sum is σ = 6094932480. Its totient is φ = 568270080.

The previous prime is 2171992891. The next prime is 2171992919. The reversal of 2171992914 is 4192991712.

It is a happy number.

It is a super-2 number, since 2×2171992914² = 9435106436932422792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2171992914.

It is not an unprimeable number, because it can be changed into a prime (2171992919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8014599 + ... + 8014869.

It is an arithmetic number, because the mean of its divisors is an integer number (31744440).

Almost surely, 2^2171992914 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2171992914, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3047466240).

2171992914 is an abundant number, since it is smaller than the sum of its proper divisors (3922939566).

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

2171992914 is a wasteful number, since it uses less digits than its factorization.

2171992914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 529 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 2171992914 is about 46604.6447685207. The cubic root of 2171992914 is about 1295.0488026410.

The spelling of 2171992914 in words is "two billion, one hundred seventy-one million, nine hundred ninety-two thousand, nine hundred fourteen".