2221472736 has 96 divisors (see below), whose sum is σ = 7404929280. Its totient is φ = 634704768.

The previous prime is 2221472731. The next prime is 2221472749. The reversal of 2221472736 is 6372741222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×2221472736² = 9869882233582651392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 2221472736.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221472731) 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, 177606 + ... + 189701.

It is an arithmetic number, because the mean of its divisors is an integer number (77134680).

Almost surely, 2^2221472736 is an apocalyptic number.

It is an amenable number.

2221472736 is an abundant number, since it is smaller than the sum of its proper divisors (5183456544).

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

2221472736 is a wasteful number, since it uses less digits than its factorization.

2221472736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367333 (or 367319 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 2221472736 is about 47132.5019068583. The cubic root of 2221472736 is about 1304.8091569254.

The spelling of 2221472736 in words is "two billion, two hundred twenty-one million, four hundred seventy-two thousand, seven hundred thirty-six".