2173213926 has 144 divisors (see below), whose sum is σ = 5395572000. Its totient is φ = 630609408.

The previous prime is 2173213879. The next prime is 2173213957. The reversal of 2173213926 is 6293123712.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6226800 + ... + 6227148.

It is an arithmetic number, because the mean of its divisors is an integer number (37469250).

Almost surely, 2^2173213926 is an apocalyptic number.

2173213926 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2173213926, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2697786000).

2173213926 is an abundant number, since it is smaller than the sum of its proper divisors (3222358074).

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

2173213926 is a wasteful number, since it uses less digits than its factorization.

2173213926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 479 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 2173213926 is about 46617.7426094400. The cubic root of 2173213926 is about 1295.2914329462.

The spelling of 2173213926 in words is "two billion, one hundred seventy-three million, two hundred thirteen thousand, nine hundred twenty-six".