2205343533561 has 12 divisors (see below), whose sum is σ = 3420532827792. Its totient is φ = 1260196304808.

The previous prime is 2205343533521. The next prime is 2205343533683. The reversal of 2205343533561 is 1653353435022.

It is a de Polignac number, because none of the positive numbers 2^k-2205343533561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2205343533521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7501168335 + ... + 7501168628.

It is an arithmetic number, because the mean of its divisors is an integer number (285044402316).

Almost surely, 2^{2205343533561} is an apocalyptic number.

2205343533561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2205343533561 is a deficient number, since it is larger than the sum of its proper divisors (1215189294231).

2205343533561 is a wasteful number, since it uses less digits than its factorization.

2205343533561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15002336980 (or 15002336973 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 42.

Adding to 2205343533561 its reverse (1653353435022), we get a palindrome (3858696968583).

The spelling of 2205343533561 in words is "two trillion, two hundred five billion, three hundred forty-three million, five hundred thirty-three thousand, five hundred sixty-one".