2194218544 has 80 divisors (see below), whose sum is σ = 4946683392. Its totient is φ = 923480064.

The previous prime is 2194218541. The next prime is 2194218563. The reversal of 2194218544 is 4458124912.

It is a junction number, because it is equal to n+sod(n) for n = 2194218497 and 2194218506.

It is not an unprimeable number, because it can be changed into a prime (2194218541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1793517 + ... + 1794739.

Almost surely, 2^2194218544 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 2194218544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2473341696).

2194218544 is an abundant number, since it is smaller than the sum of its proper divisors (2752464848).

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

2194218544 is a wasteful number, since it uses less digits than its factorization.

2194218544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514 (or 1508 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 2194218544 is about 46842.4865266565. The cubic root of 2194218544 is about 1299.4511576679.

The spelling of 2194218544 in words is "two billion, one hundred ninety-four million, two hundred eighteen thousand, five hundred forty-four".