2218158936 has 96 divisors (see below), whose sum is σ = 6891674400. Its totient is φ = 631365120.

The previous prime is 2218158907. The next prime is 2218158953. The reversal of 2218158936 is 6398518122.

2218158936 is a `hidden beast` number, since 22 + 18 + 1 + 589 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 2218158891 and 2218158900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127396 + ... + 143756.

It is an arithmetic number, because the mean of its divisors is an integer number (71788275).

Almost surely, 2^2218158936 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 2218158936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3445837200).

2218158936 is an abundant number, since it is smaller than the sum of its proper divisors (4673515464).

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

2218158936 is a wasteful number, since it uses less digits than its factorization.

2218158936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16649 (or 16642 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 2218158936 is about 47097.3347016580. The cubic root of 2218158936 is about 1304.1600337420.

The spelling of 2218158936 in words is "two billion, two hundred eighteen million, one hundred fifty-eight thousand, nine hundred thirty-six".