22451211305 has 4 divisors (see below), whose sum is σ = 26941453572. Its totient is φ = 17960969040.

The previous prime is 22451211301. The next prime is 22451211311. The reversal of 22451211305 is 50311215422.

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 15914327104 + 6536884201 = 126152^2 + 80851^2 .

It is not a de Polignac number, because 22451211305 - 2² = 22451211301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22451211301) 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, 2245121126 + ... + 2245121135.

It is an arithmetic number, because the mean of its divisors is an integer number (6735363393).

Almost surely, 2^22451211305 is an apocalyptic number.

It is an amenable number.

22451211305 is a deficient number, since it is larger than the sum of its proper divisors (4490242267).

22451211305 is an equidigital number, since it uses as much as digits as its factorization.

22451211305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4490242266.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 22451211305 its reverse (50311215422), we get a palindrome (72762426727).

The spelling of 22451211305 in words is "twenty-two billion, four hundred fifty-one million, two hundred eleven thousand, three hundred five".