22155243541 has 4 divisors (see below), whose sum is σ = 22162990284. Its totient is φ = 22147496800.

The previous prime is 22155243527. The next prime is 22155243563. The reversal of 22155243541 is 14534255122.

It is a happy number.

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 11507067441 + 10648176100 = 107271^2 + 103190^2 .

It is a cyclic number.

It is not a de Polignac number, because 22155243541 - 2²⁷ = 22021025813 is a prime.

It is a super-2 number, since 2×22155243541² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22155243497 and 22155243506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22155243521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3869080 + ... + 3874801.

It is an arithmetic number, because the mean of its divisors is an integer number (5540747571).

Almost surely, 2^22155243541 is an apocalyptic number.

It is an amenable number.

22155243541 is a deficient number, since it is larger than the sum of its proper divisors (7746743).

22155243541 is an equidigital number, since it uses as much as digits as its factorization.

22155243541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7746742.

The product of its digits is 48000, while the sum is 34.

Adding to 22155243541 its reverse (14534255122), we get a palindrome (36689498663).

The spelling of 22155243541 in words is "twenty-two billion, one hundred fifty-five million, two hundred forty-three thousand, five hundred forty-one".