205553213211 has 16 divisors (see below), whose sum is σ = 305466076800. Its totient is φ = 122186429568.

The previous prime is 205553213179. The next prime is 205553213231. The reversal of 205553213211 is 112312355502.

It is not a de Polignac number, because 205553213211 - 2⁵ = 205553213179 is a prime.

It is a super-2 number, since 2×205553213211² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205553213231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106063641 + ... + 106065578.

It is an arithmetic number, because the mean of its divisors is an integer number (19091629800).

Almost surely, 2^205553213211 is an apocalyptic number.

205553213211 is a deficient number, since it is larger than the sum of its proper divisors (99912863589).

205553213211 is a wasteful number, since it uses less digits than its factorization.

205553213211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212129258.

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 205553213211 its reverse (112312355502), we get a palindrome (317865568713).

The spelling of 205553213211 in words is "two hundred five billion, five hundred fifty-three million, two hundred thirteen thousand, two hundred eleven".