2231365644 has 60 divisors (see below), whose sum is σ = 5852492184. Its totient is φ = 741332736.

The previous prime is 2231365639. The next prime is 2231365693. The reversal of 2231365644 is 4465631322.

2231365644 is a `hidden beast` number, since 2 + 2 + 3 + 1 + 3 + 6 + 5 + 644 = 666.

2231365644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×2231365644³ (a number of 29 digits) contains 333 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 2231365599 and 2231365608.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 88252 + ... + 110684.

Almost surely, 2^2231365644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2231365644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2926246092).

2231365644 is an abundant number, since it is smaller than the sum of its proper divisors (3621126540).

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

2231365644 is a wasteful number, since it uses less digits than its factorization.

2231365644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22756 (or 22745 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 2231365644 is about 47237.3331592714. Note that the first 3 decimals coincide. The cubic root of 2231365644 is about 1306.7431956022.

Adding to 2231365644 its reverse (4465631322), we get a palindrome (6696996966).

The spelling of 2231365644 in words is "two billion, two hundred thirty-one million, three hundred sixty-five thousand, six hundred forty-four".