2213194240 has 80 divisors (see below), whose sum is σ = 5318478792. Its totient is φ = 883277824.

The previous prime is 2213194229. The next prime is 2213194259. The reversal of 2213194240 is 424913122.

It can be written as a sum of positive squares in 4 ways, for example, as 2211256576 + 1937664 = 47024^2 + 1392^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 2213194199 and 2213194208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1732482 + ... + 1733758.

Almost surely, 2^2213194240 is an apocalyptic number.

2213194240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2213194240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2659239396).

2213194240 is an abundant number, since it is smaller than the sum of its proper divisors (3105284552).

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

2213194240 is an equidigital number, since it uses as much as digits as its factorization.

2213194240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977 (or 1961 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 2213194240 is about 47044.5984146958. The cubic root of 2213194240 is about 1303.1863141065.

The spelling of 2213194240 in words is "two billion, two hundred thirteen million, one hundred ninety-four thousand, two hundred forty".