22451211455 has 4 divisors (see below), whose sum is σ = 26941453752. Its totient is φ = 17960969160.

The previous prime is 22451211451. The next prime is 22451211457. The reversal of 22451211455 is 55411215422.

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

It is not a de Polignac number, because 22451211455 - 2² = 22451211451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22451211451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2245121141 + ... + 2245121150.

It is an arithmetic number, because the mean of its divisors is an integer number (6735363438).

Almost surely, 2^22451211455 is an apocalyptic number.

22451211455 is a deficient number, since it is larger than the sum of its proper divisors (4490242297).

22451211455 is an equidigital number, since it uses as much as digits as its factorization.

22451211455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4490242296.

The product of its digits is 16000, while the sum is 32.

Adding to 22451211455 its reverse (55411215422), we get a palindrome (77862426877).

The spelling of 22451211455 in words is "twenty-two billion, four hundred fifty-one million, two hundred eleven thousand, four hundred fifty-five".