2221554740 has 24 divisors (see below), whose sum is σ = 4791354792. Its totient is φ = 864604800.

The previous prime is 2221554719. The next prime is 2221554757. The reversal of 2221554740 is 474551222.

It can be written as a sum of positive squares in 4 ways, for example, as 278155684 + 1943399056 = 16678^2 + 44084^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2221554697 and 2221554706.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1500311 + ... + 1501790.

It is an arithmetic number, because the mean of its divisors is an integer number (199639783).

Almost surely, 2^2221554740 is an apocalyptic number.

2221554740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221554740 is an abundant number, since it is smaller than the sum of its proper divisors (2569800052).

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

2221554740 is a wasteful number, since it uses less digits than its factorization.

2221554740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002147 (or 3002145 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 32.

The square root of 2221554740 is about 47133.3718293101. The cubic root of 2221554740 is about 1304.8252120783.

The spelling of 2221554740 in words is "two billion, two hundred twenty-one million, five hundred fifty-four thousand, seven hundred forty".