2221519944 has 64 divisors (see below), whose sum is σ = 6566083200. Its totient is φ = 612831744.

The previous prime is 2221519943. The next prime is 2221519967. The reversal of 2221519944 is 4499151222.

It is not an unprimeable number, because it can be changed into a prime (2221519943) 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, 223117 + ... + 232860.

It is an arithmetic number, because the mean of its divisors is an integer number (102595050).

Almost surely, 2^2221519944 is an apocalyptic number.

2221519944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2221519944 is an abundant number, since it is smaller than the sum of its proper divisors (4344563256).

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

2221519944 is a wasteful number, since it uses less digits than its factorization.

2221519944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456022 (or 456018 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 2221519944 is about 47133.0027051110. The cubic root of 2221519944 is about 1304.8183995918.

The spelling of 2221519944 in words is "two billion, two hundred twenty-one million, five hundred nineteen thousand, nine hundred forty-four".