2221519986 has 64 divisors (see below), whose sum is σ = 5650940160. Its totient is φ = 633709440.

The previous prime is 2221519981. The next prime is 2221519987. The reversal of 2221519986 is 6899151222.

It is a happy number.

2221519986 is a `hidden beast` number, since 22 + 21 + 519 + 98 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (2221519981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 251566 + ... + 260246.

It is an arithmetic number, because the mean of its divisors is an integer number (88295940).

Almost surely, 2^2221519986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221519986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2825470080).

2221519986 is an abundant number, since it is smaller than the sum of its proper divisors (3429420174).

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

2221519986 is a wasteful number, since it uses less digits than its factorization.

2221519986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9376 (or 9370 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 2221519986 is about 47133.0031506587. The cubic root of 2221519986 is about 1304.8184078147.

The spelling of 2221519986 in words is "two billion, two hundred twenty-one million, five hundred nineteen thousand, nine hundred eighty-six".