22155553203145 has 4 divisors (see below), whose sum is σ = 26586663843780. Its totient is φ = 17724442562512.

The previous prime is 22155553203073. The next prime is 22155553203181. The reversal of 22155553203145 is 54130235555122.

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 8641783175481 + 13513770027664 = 2939691^2 + 3676108^2 .

It is a cyclic number.

It is not a de Polignac number, because 22155553203145 - 2¹¹ = 22155553201097 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2215555320310 + ... + 2215555320319.

It is an arithmetic number, because the mean of its divisors is an integer number (6646665960945).

Almost surely, 2^{22155553203145} is an apocalyptic number.

It is an amenable number.

22155553203145 is a deficient number, since it is larger than the sum of its proper divisors (4431110640635).

22155553203145 is an equidigital number, since it uses as much as digits as its factorization.

22155553203145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4431110640634.

The product of its (nonzero) digits is 900000, while the sum is 43.

Adding to 22155553203145 its reverse (54130235555122), we get a palindrome (76285788758267).

The spelling of 22155553203145 in words is "twenty-two trillion, one hundred fifty-five billion, five hundred fifty-three million, two hundred three thousand, one hundred forty-five".