2224181840 has 20 divisors (see below), whose sum is σ = 5171222964. Its totient is φ = 889672704.

The previous prime is 2224181833. The next prime is 2224181849. The reversal of 2224181840 is 481814222.

It can be written as a sum of positive squares in 2 ways, for example, as 1154368576 + 1069813264 = 33976^2 + 32708^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 2224181797 and 2224181806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2224181849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13901057 + ... + 13901216.

Almost surely, 2^2224181840 is an apocalyptic number.

2224181840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2224181840 is an abundant number, since it is smaller than the sum of its proper divisors (2947041124).

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

2224181840 is a wasteful number, since it uses less digits than its factorization.

2224181840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27802286 (or 27802280 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 2224181840 is about 47161.2323842369. The cubic root of 2224181840 is about 1305.3393499050.

The spelling of 2224181840 in words is "two billion, two hundred twenty-four million, one hundred eighty-one thousand, eight hundred forty".