2251544444 has 6 divisors (see below), whose sum is σ = 3940202784. Its totient is φ = 1125772220.

The previous prime is 2251544437. The next prime is 2251544453. The reversal of 2251544444 is 4444451522.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281443052 + ... + 281443059.

It is an arithmetic number, because the mean of its divisors is an integer number (656700464).

Almost surely, 2^2251544444 is an apocalyptic number.

It is an amenable number.

2251544444 is a deficient number, since it is larger than the sum of its proper divisors (1688658340).

2251544444 is a wasteful number, since it uses less digits than its factorization.

2251544444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562886115 (or 562886113 counting only the distinct ones).

The product of its digits is 102400, while the sum is 35.

The square root of 2251544444 is about 47450.4419789742. The cubic root of 2251544444 is about 1310.6704498867.

Adding to 2251544444 its reverse (4444451522), we get a palindrome (6695995966).

The spelling of 2251544444 in words is "two billion, two hundred fifty-one million, five hundred forty-four thousand, four hundred forty-four".