22744547281 has 4 divisors (see below), whose sum is σ = 22788203364. Its totient is φ = 22700891200.

The previous prime is 22744547269. The next prime is 22744547297. The reversal of 22744547281 is 18274544722.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8061166656 + 14683380625 = 89784^2 + 121175^2 .

It is a cyclic number.

It is not a de Polignac number, because 22744547281 - 2¹³ = 22744539089 is a prime.

It is a super-2 number, since 2×22744547281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22744547261) 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, 21827260 + ... + 21828301.

It is an arithmetic number, because the mean of its divisors is an integer number (5697050841).

Almost surely, 2^22744547281 is an apocalyptic number.

It is an amenable number.

22744547281 is a deficient number, since it is larger than the sum of its proper divisors (43656083).

22744547281 is an equidigital number, since it uses as much as digits as its factorization.

22744547281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43656082.

The product of its digits is 1003520, while the sum is 46.

It can be divided in two parts, 22744 and 547281, that added together give a square (570025 = 755²).

The spelling of 22744547281 in words is "twenty-two billion, seven hundred forty-four million, five hundred forty-seven thousand, two hundred eighty-one".