22044440251 has 4 divisors (see below), whose sum is σ = 22205348712. Its totient is φ = 21883531792.

The previous prime is 22044440237. The next prime is 22044440261. The reversal of 22044440251 is 15204444022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15204444022 = 2 ⋅7602222011.

It is a cyclic number.

It is not a de Polignac number, because 22044440251 - 2²³ = 22036051643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22044440261) 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, 80454025 + ... + 80454298.

It is an arithmetic number, because the mean of its divisors is an integer number (5551337178).

Almost surely, 2^22044440251 is an apocalyptic number.

22044440251 is a deficient number, since it is larger than the sum of its proper divisors (160908461).

22044440251 is a wasteful number, since it uses less digits than its factorization.

22044440251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160908460.

The product of its (nonzero) digits is 10240, while the sum is 28.

Adding to 22044440251 its reverse (15204444022), we get a palindrome (37248884273).

The spelling of 22044440251 in words is "twenty-two billion, forty-four million, four hundred forty thousand, two hundred fifty-one".