2205154021455 has 384 divisors, whose sum is σ = 5083142169600. Its totient is φ = 896690995200.

The previous prime is 2205154021313. The next prime is 2205154021471. The reversal of 2205154021455 is 5541204515022.

2205154021455 is a `hidden beast` number, since 2 + 2 + 0 + 51 + 540 + 2 + 14 + 55 = 666.

It is not a de Polignac number, because 2205154021455 - 2⁹ = 2205154020943 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 695850111 + ... + 695853279.

It is an arithmetic number, because the mean of its divisors is an integer number (13237349400).

Almost surely, 2^{2205154021455} is an apocalyptic number.

2205154021455 is an abundant number, since it is smaller than the sum of its proper divisors (2877988148145).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2205154021455 is a wasteful number, since it uses less digits than its factorization.

2205154021455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3412 (or 3399 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

Adding to 2205154021455 its reverse (5541204515022), we get a palindrome (7746358536477).

The spelling of 2205154021455 in words is "two trillion, two hundred five billion, one hundred fifty-four million, twenty-one thousand, four hundred fifty-five".