2187223444 has 24 divisors (see below), whose sum is σ = 4436062848. Its totient is φ = 924178080.

The previous prime is 2187223421. The next prime is 2187223459. The reversal of 2187223444 is 4443227812.

It is a super-2 number, since 2×2187223444² = 9567892787966442272, which contains 22 as substring.

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, 548119 + ... + 552094.

It is an arithmetic number, because the mean of its divisors is an integer number (184835952).

Almost surely, 2^2187223444 is an apocalyptic number.

It is an amenable number.

2187223444 is an abundant number, since it is smaller than the sum of its proper divisors (2248839404).

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

2187223444 is a wasteful number, since it uses less digits than its factorization.

2187223444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100295 (or 1100293 counting only the distinct ones).

The product of its digits is 86016, while the sum is 37.

The square root of 2187223444 is about 46767.7607332231. The cubic root of 2187223444 is about 1298.0688178087.

The spelling of 2187223444 in words is "two billion, one hundred eighty-seven million, two hundred twenty-three thousand, four hundred forty-four".